20387873975 has 24 divisors (see below), whose sum is σ = 28925470080. Its totient is φ = 13964317920.

The previous prime is 20387873963. The next prime is 20387873999. The reversal of 20387873975 is 57937878302.

It is not a de Polignac number, because 20387873975 - 2⁸ = 20387873719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88556 + ... + 220494.

It is an arithmetic number, because the mean of its divisors is an integer number (1205227920).

Almost surely, 2^20387873975 is an apocalyptic number.

20387873975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20387873975 is a deficient number, since it is larger than the sum of its proper divisors (8537596105).

20387873975 is a wasteful number, since it uses less digits than its factorization.

20387873975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132839 (or 132834 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 20387873975 in words is "twenty billion, three hundred eighty-seven million, eight hundred seventy-three thousand, nine hundred seventy-five".