21360874 has 8 divisors (see below), whose sum is σ = 33926148. Its totient is φ = 10052160.

The previous prime is 21360863. The next prime is 21360881. The reversal of 21360874 is 47806312.

It can be written as a sum of positive squares in 2 ways, for example, as 21095649 + 265225 = 4593^2 + 515^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 314097 + ... + 314164.

Almost surely, 2^21360874 is an apocalyptic number.

21360874 is a deficient number, since it is larger than the sum of its proper divisors (12565274).

21360874 is a wasteful number, since it uses less digits than its factorization.

21360874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628280.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 21360874 is about 4621.7825565468. The cubic root of 21360874 is about 277.4638061174.

The spelling of 21360874 in words is "twenty-one million, three hundred sixty thousand, eight hundred seventy-four".