20421143313 has 8 divisors (see below), whose sum is σ = 27229104000. Its totient is φ = 13613639088.

The previous prime is 20421143273. The next prime is 20421143321. The reversal of 20421143313 is 31334112402.

It is a happy number.

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

It is not a de Polignac number, because 20421143313 - 2¹⁰ = 20421142289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20421143383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9363 + ... + 202311.

It is an arithmetic number, because the mean of its divisors is an integer number (3403638000).

Almost surely, 2^20421143313 is an apocalyptic number.

It is an amenable number.

20421143313 is a deficient number, since it is larger than the sum of its proper divisors (6807960687).

20421143313 is a wasteful number, since it uses less digits than its factorization.

20421143313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228231.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20421143313 its reverse (31334112402), we get a palindrome (51755255715).

The spelling of 20421143313 in words is "twenty billion, four hundred twenty-one million, one hundred forty-three thousand, three hundred thirteen".