21695048 has 16 divisors (see below), whose sum is σ = 41624880. Its totient is φ = 10595088.

The previous prime is 21695021. The next prime is 21695057. The reversal of 21695048 is 84059612.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21694999 and 21695017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31190 + ... + 31877.

It is an arithmetic number, because the mean of its divisors is an integer number (2601555).

Almost surely, 2^21695048 is an apocalyptic number.

It is an amenable number.

21695048 is a deficient number, since it is larger than the sum of its proper divisors (19929832).

21695048 is a wasteful number, since it uses less digits than its factorization.

21695048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63116 (or 63112 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 21695048 is about 4657.7943277908. The cubic root of 21695048 is about 278.9032265015.

The spelling of 21695048 in words is "twenty-one million, six hundred ninety-five thousand, forty-eight".