20321401023 has 36 divisors (see below), whose sum is σ = 36873373264. Its totient is φ = 10556568000.

The previous prime is 20321401019. The next prime is 20321401039. The reversal of 20321401023 is 32010412302.

It is not a de Polignac number, because 20321401023 - 2² = 20321401019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20321400987 and 20321401005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321401073) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1325278 + ... + 1340523.

Almost surely, 2^20321401023 is an apocalyptic number.

20321401023 is a deficient number, since it is larger than the sum of its proper divisors (16551972241).

20321401023 is a wasteful number, since it uses less digits than its factorization.

20321401023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665836 (or 2665822 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20321401023 its reverse (32010412302), we get a palindrome (52331813325).

The spelling of 20321401023 in words is "twenty billion, three hundred twenty-one million, four hundred one thousand, twenty-three".