20957230 has 16 divisors (see below), whose sum is σ = 43112160. Its totient is φ = 7185312.

The previous prime is 20957219. The next prime is 20957231. The reversal of 20957230 is 3275902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20957231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149625 + ... + 149764.

It is an arithmetic number, because the mean of its divisors is an integer number (2694510).

Almost surely, 2^20957230 is an apocalyptic number.

20957230 is an abundant number, since it is smaller than the sum of its proper divisors (22154930).

20957230 is a wasteful number, since it uses less digits than its factorization.

20957230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299403.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 20957230 is about 4577.9067268786. The cubic root of 20957230 is about 275.7049900411.

The spelling of 20957230 in words is "twenty million, nine hundred fifty-seven thousand, two hundred thirty".