21032810952 has 64 divisors (see below), whose sum is σ = 53725870080. Its totient is φ = 6858564672.

The previous prime is 21032810921. The next prime is 21032810957. The reversal of 21032810952 is 25901823012.

It is a happy number.

It is a super-2 number, since 2×21032810952² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21032810957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4287333 + ... + 4292235.

It is an arithmetic number, because the mean of its divisors is an integer number (839466720).

Almost surely, 2^21032810952 is an apocalyptic number.

It is an amenable number.

21032810952 is an abundant number, since it is smaller than the sum of its proper divisors (32693059128).

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

21032810952 is a wasteful number, since it uses less digits than its factorization.

21032810952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8762 (or 8758 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 21032810952 in words is "twenty-one billion, thirty-two million, eight hundred ten thousand, nine hundred fifty-two".