20659474 has 16 divisors (see below), whose sum is σ = 35277120. Its totient is φ = 8982160.

The previous prime is 20659427. The next prime is 20659493. The reversal of 20659474 is 47495602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19909 + ... + 20920.

It is an arithmetic number, because the mean of its divisors is an integer number (2204820).

Almost surely, 2^20659474 is an apocalyptic number.

20659474 is a deficient number, since it is larger than the sum of its proper divisors (14617646).

20659474 is a wasteful number, since it uses less digits than its factorization.

20659474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40865.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 20659474 is about 4545.2694089570. The cubic root of 20659474 is about 274.3930370924.

The spelling of 20659474 in words is "twenty million, six hundred fifty-nine thousand, four hundred seventy-four".