20664643202 has 32 divisors (see below), whose sum is σ = 35885887488. Its totient is φ = 8741791296.

The previous prime is 20664643189. The next prime is 20664643211. The reversal of 20664643202 is 20234646602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320768 + ... + 379764.

It is an arithmetic number, because the mean of its divisors is an integer number (1121433984).

Almost surely, 2^20664643202 is an apocalyptic number.

20664643202 is a deficient number, since it is larger than the sum of its proper divisors (15221244286).

20664643202 is a wasteful number, since it uses less digits than its factorization.

20664643202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59330.

The product of its (nonzero) digits is 82944, while the sum is 35.

The spelling of 20664643202 in words is "twenty billion, six hundred sixty-four million, six hundred forty-three thousand, two hundred two".