20090206164 has 24 divisors (see below), whose sum is σ = 53573883328. Its totient is φ = 5740058880.

The previous prime is 20090206163. The next prime is 20090206181. The reversal of 20090206164 is 46160209002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20090206163) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 119584477 + ... + 119584644.

Almost surely, 2^20090206164 is an apocalyptic number.

It is an amenable number.

20090206164 is an abundant number, since it is smaller than the sum of its proper divisors (33483677164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20090206164 is a wasteful number, since it uses less digits than its factorization.

20090206164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239169135 (or 239169133 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 20090206164 in words is "twenty billion, ninety million, two hundred six thousand, one hundred sixty-four".