21242983960 has 64 divisors (see below), whose sum is σ = 53413668000. Its totient is φ = 7536307200.

The previous prime is 21242983933. The next prime is 21242983987. The reversal of 21242983960 is 6938924212.

It is an interprime number because it is at equal distance from previous prime (21242983933) and next prime (21242983987).

It is a self number, because there is not a number n which added to its sum of digits gives 21242983960.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570735 + ... + 606814.

Almost surely, 2^21242983960 is an apocalyptic number.

21242983960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21242983960 is an abundant number, since it is smaller than the sum of its proper divisors (32170684040).

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

21242983960 is a wasteful number, since it uses less digits than its factorization.

21242983960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177612 (or 1177608 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 21242983960 in words is "twenty-one billion, two hundred forty-two million, nine hundred eighty-three thousand, nine hundred sixty".