21364014 has 32 divisors (see below), whose sum is σ = 49038336. Its totient is φ = 6078240.

The previous prime is 21364009. The next prime is 21364061. The reversal of 21364014 is 41046312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 10444 + ... + 12320.

It is an arithmetic number, because the mean of its divisors is an integer number (1532448).

Almost surely, 2^21364014 is an apocalyptic number.

21364014 is an abundant number, since it is smaller than the sum of its proper divisors (27674322).

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

21364014 is a wasteful number, since it uses less digits than its factorization.

21364014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 21364014 is about 4622.1222398375. The cubic root of 21364014 is about 277.4774009678.

The spelling of 21364014 in words is "twenty-one million, three hundred sixty-four thousand, fourteen".