21914160 has 40 divisors (see below), whose sum is σ = 67934640. Its totient is φ = 5843712.

The previous prime is 21914153. The next prime is 21914161. The reversal of 21914160 is 6141912.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 21914160.

It is not an unprimeable number, because it can be changed into a prime (21914161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45415 + ... + 45894.

It is an arithmetic number, because the mean of its divisors is an integer number (1698366).

Almost surely, 2^21914160 is an apocalyptic number.

21914160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21914160 is an abundant number, since it is smaller than the sum of its proper divisors (46020480).

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

21914160 is a wasteful number, since it uses less digits than its factorization.

21914160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91325 (or 91319 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 21914160 is about 4681.2562416514. The cubic root of 21914160 is about 279.8390231156.

The spelling of 21914160 in words is "twenty-one million, nine hundred fourteen thousand, one hundred sixty".