20431303420 has 48 divisors (see below), whose sum is σ = 48841325568. Its totient is φ = 7106538560.

The previous prime is 20431303411. The next prime is 20431303429. The reversal of 20431303420 is 2430313402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20431303411) and next prime (20431303429).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 20431303391 and 20431303400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431303429) 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 15 ways as a sum of consecutive naturals, for example, 2013844 + ... + 2023963.

It is an arithmetic number, because the mean of its divisors is an integer number (1017527616).

Almost surely, 2^20431303420 is an apocalyptic number.

20431303420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20431303420 is an abundant number, since it is smaller than the sum of its proper divisors (28410022148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20431303420 is a wasteful number, since it uses less digits than its factorization.

20431303420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037850 (or 4037848 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20431303420 its reverse (2430313402), we get a palindrome (22861616822).

The spelling of 20431303420 in words is "twenty billion, four hundred thirty-one million, three hundred three thousand, four hundred twenty".