20331300031021 has 24 divisors (see below), whose sum is σ = 24435352843776. Its totient is φ = 16854301044000.

The previous prime is 20331300031019. The next prime is 20331300031027. The reversal of 20331300031021 is 12013000313302.

It is not a de Polignac number, because 20331300031021 - 2¹ = 20331300031019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20331300031021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331300031027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33272605 + ... + 33878146.

It is an arithmetic number, because the mean of its divisors is an integer number (1018139701824).

Almost surely, 2^{20331300031021} is an apocalyptic number.

It is an amenable number.

20331300031021 is a deficient number, since it is larger than the sum of its proper divisors (4104052812755).

20331300031021 is a wasteful number, since it uses less digits than its factorization.

20331300031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67150969 (or 67150962 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20331300031021 its reverse (12013000313302), we get a palindrome (32344300344323).

The spelling of 20331300031021 in words is "twenty trillion, three hundred thirty-one billion, three hundred million, thirty-one thousand, twenty-one".