20387873976 has 16 divisors (see below), whose sum is σ = 50969685000. Its totient is φ = 6795957984.

The previous prime is 20387873963. The next prime is 20387873999. The reversal of 20387873976 is 67937878302.

It is a super-2 number, since 2×20387873976² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424747351 + ... + 424747398.

Almost surely, 2^20387873976 is an apocalyptic number.

It is an amenable number.

20387873976 is an abundant number, since it is smaller than the sum of its proper divisors (30581811024).

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

20387873976 is a wasteful number, since it uses less digits than its factorization.

20387873976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849494758 (or 849494754 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 60.

The spelling of 20387873976 in words is "twenty billion, three hundred eighty-seven million, eight hundred seventy-three thousand, nine hundred seventy-six".