15508242820 has 48 divisors (see below), whose sum is σ = 37236665088. Its totient is φ = 5314700160.

The previous prime is 15508242803. The next prime is 15508242847. The reversal of 15508242820 is 2824280551.

It is a self number, because there is not a number n which added to its sum of digits gives 15508242820.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299574 + ... + 347506.

It is an arithmetic number, because the mean of its divisors is an integer number (775763856).

Almost surely, 2^15508242820 is an apocalyptic number.

15508242820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15508242820 is an abundant number, since it is smaller than the sum of its proper divisors (21728422268).

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

15508242820 is a wasteful number, since it uses less digits than its factorization.

15508242820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50260 (or 50258 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 37.

The spelling of 15508242820 in words is "fifteen billion, five hundred eight million, two hundred forty-two thousand, eight hundred twenty".