21914810 has 16 divisors (see below), whose sum is σ = 39608352. Its totient is φ = 8730000.

The previous prime is 21914801. The next prime is 21914813. The reversal of 21914810 is 1841912.

It is a super-2 number, since 2×21914810² = 960517794672200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21914810.

It is not an unprimeable number, because it can be changed into a prime (21914813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856 + ... + 6875.

It is an arithmetic number, because the mean of its divisors is an integer number (2475522).

Almost surely, 2^21914810 is an apocalyptic number.

21914810 is a deficient number, since it is larger than the sum of its proper divisors (17693542).

21914810 is a wasteful number, since it uses less digits than its factorization.

21914810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8989.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 21914810 is about 4681.3256669452. The cubic root of 21914810 is about 279.8417898741.

The spelling of 21914810 in words is "twenty-one million, nine hundred fourteen thousand, eight hundred ten".