21514746 has 32 divisors (see below), whose sum is σ = 47226816. Its totient is φ = 6480000.

The previous prime is 21514739. The next prime is 21514751. The reversal of 21514746 is 64741512.

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, 11046 + ... + 12846.

It is an arithmetic number, because the mean of its divisors is an integer number (1475838).

Almost surely, 2^21514746 is an apocalyptic number.

21514746 is an abundant number, since it is smaller than the sum of its proper divisors (25712070).

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

21514746 is a wasteful number, since it uses less digits than its factorization.

21514746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998.

The product of its digits is 6720, while the sum is 30.

The square root of 21514746 is about 4638.3990772679. The cubic root of 21514746 is about 278.1284450358.

The spelling of 21514746 in words is "twenty-one million, five hundred fourteen thousand, seven hundred forty-six".