20664274 has 8 divisors (see below), whose sum is σ = 31459248. Its totient is φ = 10177860.

The previous prime is 20664257. The next prime is 20664289. The reversal of 20664274 is 47246602.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76972 + ... + 77239.

It is an arithmetic number, because the mean of its divisors is an integer number (3932406).

Almost surely, 2^20664274 is an apocalyptic number.

20664274 is a deficient number, since it is larger than the sum of its proper divisors (10794974).

20664274 is a wasteful number, since it uses less digits than its factorization.

20664274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154280.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 20664274 is about 4545.7973997969. The cubic root of 20664274 is about 274.4142861746.

The spelling of 20664274 in words is "twenty million, six hundred sixty-four thousand, two hundred seventy-four".