21752445700 has 36 divisors (see below), whose sum is σ = 47574510592. Its totient is φ = 8632461600.

The previous prime is 21752445677. The next prime is 21752445703. The reversal of 21752445700 is 754425712.

It is a self number, because there is not a number n which added to its sum of digits gives 21752445700.

It is not an unprimeable number, because it can be changed into a prime (21752445703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 843696 + ... + 869095.

Almost surely, 2^21752445700 is an apocalyptic number.

21752445700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21752445700 is an abundant number, since it is smaller than the sum of its proper divisors (25822064892).

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

21752445700 is a wasteful number, since it uses less digits than its factorization.

21752445700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712932 (or 1712925 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 37.

The spelling of 21752445700 in words is "twenty-one billion, seven hundred fifty-two million, four hundred forty-five thousand, seven hundred".