20577490 has 32 divisors (see below), whose sum is σ = 39191040. Its totient is φ = 7766400.

The previous prime is 20577481. The next prime is 20577511. The reversal of 20577490 is 9477502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11901 + ... + 13519.

It is an arithmetic number, because the mean of its divisors is an integer number (1224720).

Almost surely, 2^20577490 is an apocalyptic number.

20577490 is a deficient number, since it is larger than the sum of its proper divisors (18613550).

20577490 is a wasteful number, since it uses less digits than its factorization.

20577490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 20577490 is about 4536.2418365868. The cubic root of 20577490 is about 274.0295934790.

The spelling of 20577490 in words is "twenty million, five hundred seventy-seven thousand, four hundred ninety".