21725033400 has 144 divisors (see below), whose sum is σ = 83382795600. Its totient is φ = 4965719040.

The previous prime is 21725033377. The next prime is 21725033437. The reversal of 21725033400 is 433052712.

21725033400 is a `hidden beast` number, since 2 + 1 + 7 + 250 + 3 + 3 + 400 = 666.

It is a super-2 number, since 2×21725033400² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 849505 + ... + 874704.

Almost surely, 2^21725033400 is an apocalyptic number.

21725033400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21725033400 is an abundant number, since it is smaller than the sum of its proper divisors (61657762200).

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

21725033400 is a wasteful number, since it uses less digits than its factorization.

21725033400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724238 (or 1724226 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The spelling of 21725033400 in words is "twenty-one billion, seven hundred twenty-five million, thirty-three thousand, four hundred".