21020023132 has 12 divisors (see below), whose sum is σ = 37049682040. Its totient is φ = 10434399696.

The previous prime is 21020023117. The next prime is 21020023147. The reversal of 21020023132 is 23132002012.

It is an interprime number because it is at equal distance from previous prime (21020023117) and next prime (21020023147).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18902343 + ... + 18903454.

Almost surely, 2^21020023132 is an apocalyptic number.

It is an amenable number.

21020023132 is a deficient number, since it is larger than the sum of its proper divisors (16029658908).

21020023132 is a wasteful number, since it uses less digits than its factorization.

21020023132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37805940 (or 37805938 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21020023132 its reverse (23132002012), we get a palindrome (44152025144).

It can be divided in two parts, 210200 and 23132, that added together give a palindrome (233332).

The spelling of 21020023132 in words is "twenty-one billion, twenty million, twenty-three thousand, one hundred thirty-two".