16731507420 has 72 divisors (see below), whose sum is σ = 52631967024. Its totient is φ = 4461734016.

The previous prime is 16731507391. The next prime is 16731507421. The reversal of 16731507420 is 2470513761.

It is a happy number.

16731507420 is a `hidden beast` number, since 16 + 73 + 150 + 7 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16731507421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1716489 + ... + 1726208.

It is an arithmetic number, because the mean of its divisors is an integer number (730999542).

Almost surely, 2^16731507420 is an apocalyptic number.

16731507420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16731507420 is an abundant number, since it is smaller than the sum of its proper divisors (35900459604).

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

16731507420 is a wasteful number, since it uses less digits than its factorization.

16731507420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442721 (or 3442707 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 16731507420 in words is "sixteen billion, seven hundred thirty-one million, five hundred seven thousand, four hundred twenty".