21912714 has 32 divisors (see below), whose sum is σ = 49832640. Its totient is φ = 7133616.

The previous prime is 21912697. The next prime is 21912727. The reversal of 21912714 is 41721912.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2397 + ... + 7040.

It is an arithmetic number, because the mean of its divisors is an integer number (1557270).

Almost surely, 2^21912714 is an apocalyptic number.

21912714 is an abundant number, since it is smaller than the sum of its proper divisors (27919926).

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

21912714 is a wasteful number, since it uses less digits than its factorization.

21912714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9491 (or 9485 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 21912714 is about 4681.1017933816. The cubic root of 21912714 is about 279.8328679458.

The spelling of 21912714 in words is "twenty-one million, nine hundred twelve thousand, seven hundred fourteen".