21372700 has 18 divisors (see below), whose sum is σ = 46378976. Its totient is φ = 8549040.

The previous prime is 21372697. The next prime is 21372713. The reversal of 21372700 is 727312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106764 + ... + 106963.

Almost surely, 2^21372700 is an apocalyptic number.

21372700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21372700 is an abundant number, since it is smaller than the sum of its proper divisors (25006276).

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

21372700 is a wasteful number, since it uses less digits than its factorization.

21372700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213741 (or 213734 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 21372700 is about 4623.0617560227. The cubic root of 21372700 is about 277.5150006771.

The spelling of 21372700 in words is "twenty-one million, three hundred seventy-two thousand, seven hundred".