21683885052 has 24 divisors (see below), whose sum is σ = 53258665600. Its totient is φ = 6847542576.

The previous prime is 21683885051. The next prime is 21683885057. The reversal of 21683885052 is 25058838612.

It is a junction number, because it is equal to n+sod(n) for n = 21683884992 and 21683885010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21683885051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47552152 + ... + 47552607.

Almost surely, 2^21683885052 is an apocalyptic number.

It is an amenable number.

21683885052 is an abundant number, since it is smaller than the sum of its proper divisors (31574780548).

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

21683885052 is a wasteful number, since it uses less digits than its factorization.

21683885052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95104785 (or 95104783 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 21683885052 in words is "twenty-one billion, six hundred eighty-three million, eight hundred eighty-five thousand, fifty-two".