20387479488 has 28 divisors (see below), whose sum is σ = 53941873320. Its totient is φ = 6795826432.

The previous prime is 20387479487. The next prime is 20387479543. The reversal of 20387479488 is 88497478302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20387479487) 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, 53092203 + ... + 53092586.

Almost surely, 2^20387479488 is an apocalyptic number.

It is an amenable number.

20387479488 is an abundant number, since it is smaller than the sum of its proper divisors (33554393832).

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

20387479488 is a wasteful number, since it uses less digits than its factorization.

20387479488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106184804 (or 106184794 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 60.

The spelling of 20387479488 in words is "twenty billion, three hundred eighty-seven million, four hundred seventy-nine thousand, four hundred eighty-eight".