20959190 has 16 divisors (see below), whose sum is σ = 43116192. Its totient is φ = 7185984.

The previous prime is 20959163. The next prime is 20959229. The reversal of 20959190 is 9195902.

It is a super-2 number, since 2×20959190² = 878575290912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20959190.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149639 + ... + 149778.

It is an arithmetic number, because the mean of its divisors is an integer number (2694762).

Almost surely, 2^20959190 is an apocalyptic number.

20959190 is an abundant number, since it is smaller than the sum of its proper divisors (22157002).

20959190 is a wasteful number, since it uses less digits than its factorization.

20959190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299431.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 20959190 is about 4578.1207935134. The cubic root of 20959190 is about 275.7135847669.

The spelling of 20959190 in words is "twenty million, nine hundred fifty-nine thousand, one hundred ninety".