20313203421 has 8 divisors (see below), whose sum is σ = 30953452864. Its totient is φ = 11607544800.

The previous prime is 20313203413. The next prime is 20313203429. The reversal of 20313203421 is 12430231302.

It is an interprime number because it is at equal distance from previous prime (20313203413) and next prime (20313203429).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20313203421 - 2³ = 20313203413 is a prime.

It is a super-2 number, since 2×20313203421² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 967295401 = 20313203421 / (2 + 0 + 3 + 1 + 3 + 2 + 0 + 3 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313203429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483647680 + ... + 483647721.

It is an arithmetic number, because the mean of its divisors is an integer number (3869181608).

Almost surely, 2^20313203421 is an apocalyptic number.

20313203421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20313203421 is a deficient number, since it is larger than the sum of its proper divisors (10640249443).

20313203421 is an equidigital number, since it uses as much as digits as its factorization.

20313203421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967295411.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20313203421 its reverse (12430231302), we get a palindrome (32743434723).

The spelling of 20313203421 in words is "twenty billion, three hundred thirteen million, two hundred three thousand, four hundred twenty-one".