21970595 has 16 divisors (see below), whose sum is σ = 26956800. Its totient is φ = 17186400.

The previous prime is 21970577. The next prime is 21970601. The reversal of 21970595 is 59507912.

It is not a de Polignac number, because 21970595 - 2⁸ = 21970339 is a prime.

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, 70490 + ... + 70800.

It is an arithmetic number, because the mean of its divisors is an integer number (1684800).

Almost surely, 2^21970595 is an apocalyptic number.

21970595 is a deficient number, since it is larger than the sum of its proper divisors (4986205).

21970595 is a wasteful number, since it uses less digits than its factorization.

21970595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 21970595 is about 4687.2801281767. The cubic root of 21970595 is about 280.0790380613.

The spelling of 21970595 in words is "twenty-one million, nine hundred seventy thousand, five hundred ninety-five".