21382700 has 18 divisors (see below), whose sum is σ = 46400676. Its totient is φ = 8553040.

The previous prime is 21382687. The next prime is 21382717. The reversal of 21382700 is 728312.

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, 106814 + ... + 107013.

Almost surely, 2^21382700 is an apocalyptic number.

21382700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21382700 is an abundant number, since it is smaller than the sum of its proper divisors (25017976).

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

21382700 is a wasteful number, since it uses less digits than its factorization.

21382700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213841 (or 213834 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 21382700 is about 4624.1431638737. The cubic root of 21382700 is about 277.5582757788.

The spelling of 21382700 in words is "twenty-one million, three hundred eighty-two thousand, seven hundred".