20210646892 has 12 divisors (see below), whose sum is σ = 36191158696. Its totient is φ = 9870315840.

The previous prime is 20210646889. The next prime is 20210646893. The reversal of 20210646892 is 29864601202.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20210646893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58751709 + ... + 58752052.

Almost surely, 2^20210646892 is an apocalyptic number.

It is an amenable number.

20210646892 is a deficient number, since it is larger than the sum of its proper divisors (15980511804).

20210646892 is a wasteful number, since it uses less digits than its factorization.

20210646892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117503808 (or 117503806 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 20210646892 in words is "twenty billion, two hundred ten million, six hundred forty-six thousand, eight hundred ninety-two".