21386300 has 36 divisors (see below), whose sum is σ = 49981176. Its totient is φ = 7896000.

The previous prime is 21386293. The next prime is 21386329. The reversal of 21386300 is 368312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6926 + ... + 9525.

It is an arithmetic number, because the mean of its divisors is an integer number (1388366).

Almost surely, 2^21386300 is an apocalyptic number.

21386300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21386300 is an abundant number, since it is smaller than the sum of its proper divisors (28594876).

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

21386300 is a wasteful number, since it uses less digits than its factorization.

21386300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16478 (or 16471 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21386300 is about 4624.5324087955. The cubic root of 21386300 is about 277.5738515125.

The spelling of 21386300 in words is "twenty-one million, three hundred eighty-six thousand, three hundred".