15320007920 has 40 divisors (see below), whose sum is σ = 40707451104. Its totient is φ = 5252573952.

The previous prime is 15320007919. The next prime is 15320007943. The reversal of 15320007920 is 2970002351.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13678019 + ... + 13679138.

Almost surely, 2^15320007920 is an apocalyptic number.

15320007920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15320007920 is an abundant number, since it is smaller than the sum of its proper divisors (25387443184).

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

15320007920 is a wasteful number, since it uses less digits than its factorization.

15320007920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27357177 (or 27357171 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The spelling of 15320007920 in words is "fifteen billion, three hundred twenty million, seven thousand, nine hundred twenty".