20957590 has 8 divisors (see below), whose sum is σ = 37723680. Its totient is φ = 8383032.

The previous prime is 20957561. The next prime is 20957593. The reversal of 20957590 is 9575902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20957593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047870 + ... + 1047889.

It is an arithmetic number, because the mean of its divisors is an integer number (4715460).

Almost surely, 2^20957590 is an apocalyptic number.

20957590 is a deficient number, since it is larger than the sum of its proper divisors (16766090).

20957590 is a wasteful number, since it uses less digits than its factorization.

20957590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095766.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 20957590 is about 4577.9460459905. The cubic root of 20957590 is about 275.7065687044.

The spelling of 20957590 in words is "twenty million, nine hundred fifty-seven thousand, five hundred ninety".