20664802 has 8 divisors (see below), whose sum is σ = 31304412. Its totient is φ = 10230000.

The previous prime is 20664793. The next prime is 20664823. The reversal of 20664802 is 20846602.

It can be written as a sum of positive squares in 2 ways, for example, as 20241001 + 423801 = 4499^2 + 651^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 50949 + ... + 51352.

Almost surely, 2^20664802 is an apocalyptic number.

20664802 is a deficient number, since it is larger than the sum of its proper divisors (10639610).

20664802 is a wasteful number, since it uses less digits than its factorization.

20664802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102404.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 20664802 is about 4545.8554750454. The cubic root of 20664802 is about 274.4166233728.

The spelling of 20664802 in words is "twenty million, six hundred sixty-four thousand, eight hundred two".