20387088280 has 32 divisors (see below), whose sum is σ = 49399484400. Its totient is φ = 7527540096.

The previous prime is 20387088251. The next prime is 20387088287. The reversal of 20387088280 is 8288078302.

It is a self number, because there is not a number n which added to its sum of digits gives 20387088280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20387088287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19602450 + ... + 19603489.

Almost surely, 2^20387088280 is an apocalyptic number.

20387088280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20387088280 is an abundant number, since it is smaller than the sum of its proper divisors (29012396120).

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

20387088280 is a wasteful number, since it uses less digits than its factorization.

20387088280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39205963 (or 39205959 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The spelling of 20387088280 in words is "twenty billion, three hundred eighty-seven million, eighty-eight thousand, two hundred eighty".