20487966992 has 40 divisors (see below), whose sum is σ = 40868217600. Its totient is φ = 9943845120.

The previous prime is 20487966907. The next prime is 20487967001. The reversal of 20487966992 is 29966978402.

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 7 ways as a sum of consecutive naturals, for example, 52073 + ... + 209015.

It is an arithmetic number, because the mean of its divisors is an integer number (1021705440).

Almost surely, 2^20487966992 is an apocalyptic number.

It is an amenable number.

20487966992 is a deficient number, since it is larger than the sum of its proper divisors (20380250608).

20487966992 is a wasteful number, since it uses less digits than its factorization.

20487966992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157191 (or 157185 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 20487966992 in words is "twenty billion, four hundred eighty-seven million, nine hundred sixty-six thousand, nine hundred ninety-two".