20972595 has 16 divisors (see below), whose sum is σ = 38350080. Its totient is φ = 9587424.

The previous prime is 20972587. The next prime is 20972603. The reversal of 20972595 is 59527902.

It is an interprime number because it is at equal distance from previous prime (20972587) and next prime (20972603).

It is not a de Polignac number, because 20972595 - 2³ = 20972587 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99765 + ... + 99974.

It is an arithmetic number, because the mean of its divisors is an integer number (2396880).

Almost surely, 2^20972595 is an apocalyptic number.

20972595 is a deficient number, since it is larger than the sum of its proper divisors (17377485).

20972595 is a wasteful number, since it uses less digits than its factorization.

20972595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199754.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 20972595 is about 4579.5845881477. The cubic root of 20972595 is about 275.7723521928.

The spelling of 20972595 in words is "twenty million, nine hundred seventy-two thousand, five hundred ninety-five".