21023022032 has 10 divisors (see below), whose sum is σ = 40732105218. Its totient is φ = 10511511008.

The previous prime is 21023022011. The next prime is 21023022047. The reversal of 21023022032 is 23022032012.

It can be written as a sum of positive squares in only one way, i.e., 15586024336 + 5436997696 = 124844^2 + 73736^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21023022032.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 656969423 + ... + 656969454.

Almost surely, 2^21023022032 is an apocalyptic number.

It is an amenable number.

21023022032 is a deficient number, since it is larger than the sum of its proper divisors (19709083186).

21023022032 is a wasteful number, since it uses less digits than its factorization.

21023022032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313938885 (or 1313938879 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21023022032 its reverse (23022032012), we get a palindrome (44045054044).

The spelling of 21023022032 in words is "twenty-one billion, twenty-three million, twenty-two thousand, thirty-two".