20897192 has 16 divisors (see below), whose sum is σ = 39444000. Its totient is φ = 10378800.

The previous prime is 20897147. The next prime is 20897213. The reversal of 20897192 is 29179802.

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, 7442 + ... + 9857.

It is an arithmetic number, because the mean of its divisors is an integer number (2465250).

Almost surely, 2^20897192 is an apocalyptic number.

It is an amenable number.

20897192 is a deficient number, since it is larger than the sum of its proper divisors (18546808).

20897192 is a wasteful number, since it uses less digits than its factorization.

20897192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17456 (or 17452 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 20897192 is about 4571.3446599442. The cubic root of 20897192 is about 275.4414595376.

The spelling of 20897192 in words is "twenty million, eight hundred ninety-seven thousand, one hundred ninety-two".