21437074 has 16 divisors (see below), whose sum is σ = 32931360. Its totient is φ = 10463200.

The previous prime is 21437071. The next prime is 21437083. The reversal of 21437074 is 47073412.

It is not an unprimeable number, because it can be changed into a prime (21437071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14049 + ... + 15499.

It is an arithmetic number, because the mean of its divisors is an integer number (2058210).

Almost surely, 2^21437074 is an apocalyptic number.

21437074 is a deficient number, since it is larger than the sum of its proper divisors (11494286).

21437074 is a wasteful number, since it uses less digits than its factorization.

21437074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 21437074 is about 4630.0187904586. The cubic root of 21437074 is about 277.7933439929.

The spelling of 21437074 in words is "twenty-one million, four hundred thirty-seven thousand, seventy-four".