20331021324 has 24 divisors (see below), whose sum is σ = 47482324848. Its totient is φ = 6770824960.

The previous prime is 20331021251. The next prime is 20331021391. The reversal of 20331021324 is 42312013302.

It is a self number, because there is not a number n which added to its sum of digits gives 20331021324.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759057 + ... + 785384.

It is an arithmetic number, because the mean of its divisors is an integer number (1978430202).

Almost surely, 2^20331021324 is an apocalyptic number.

It is an amenable number.

20331021324 is an abundant number, since it is smaller than the sum of its proper divisors (27151303524).

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

20331021324 is a wasteful number, since it uses less digits than its factorization.

20331021324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545545 (or 1545543 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20331021324 its reverse (42312013302), we get a palindrome (62643034626).

The spelling of 20331021324 in words is "twenty billion, three hundred thirty-one million, twenty-one thousand, three hundred twenty-four".