21714900 has 36 divisors (see below), whose sum is σ = 62829312. Its totient is φ = 5790560.

The previous prime is 21714887. The next prime is 21714907. The reversal of 21714900 is 941712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21714907) 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, 35892 + ... + 36491.

Almost surely, 2^21714900 is an apocalyptic number.

21714900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21714900 is an abundant number, since it is smaller than the sum of its proper divisors (41114412).

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

21714900 is a wasteful number, since it uses less digits than its factorization.

21714900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72400 (or 72393 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 21714900 is about 4659.9248920986. The cubic root of 21714900 is about 278.9882704695.

The spelling of 21714900 in words is "twenty-one million, seven hundred fourteen thousand, nine hundred".