20031032021 has 64 divisors (see below), whose sum is σ = 27216967680. Its totient is φ = 14236611840.

The previous prime is 20031031997. The next prime is 20031032023. The reversal of 20031032021 is 12023013002.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20031032021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20031031987 and 20031032005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031032023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47806550 + ... + 47806968.

It is an arithmetic number, because the mean of its divisors is an integer number (425265120).

Almost surely, 2^20031032021 is an apocalyptic number.

It is an amenable number.

20031032021 is a deficient number, since it is larger than the sum of its proper divisors (7185935659).

20031032021 is a wasteful number, since it uses less digits than its factorization.

20031032021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20031032021 its reverse (12023013002), we get a palindrome (32054045023).

The spelling of 20031032021 in words is "twenty billion, thirty-one million, thirty-two thousand, twenty-one".