20372310421 has 16 divisors (see below), whose sum is σ = 21349008000. Its totient is φ = 19403388928.

The previous prime is 20372310407. The next prime is 20372310449. The reversal of 20372310421 is 12401327302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20372310421 - 2²³ = 20363921813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20372310481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5874330 + ... + 5877796.

It is an arithmetic number, because the mean of its divisors is an integer number (1334313000).

Almost surely, 2^20372310421 is an apocalyptic number.

It is an amenable number.

20372310421 is a deficient number, since it is larger than the sum of its proper divisors (976697579).

20372310421 is a wasteful number, since it uses less digits than its factorization.

20372310421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 20372310421 its reverse (12401327302), we get a palindrome (32773637723).

The spelling of 20372310421 in words is "twenty billion, three hundred seventy-two million, three hundred ten thousand, four hundred twenty-one".