16247923840 has 32 divisors (see below), whose sum is σ = 38842694460. Its totient is φ = 6499169280.

The previous prime is 16247923831. The next prime is 16247923883. The reversal of 16247923840 is 4832974261.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15015071296 + 1232852544 = 122536^2 + 35112^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×16247923840² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12693051 + ... + 12694330.

Almost surely, 2^16247923840 is an apocalyptic number.

16247923840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16247923840 is an abundant number, since it is smaller than the sum of its proper divisors (22594770620).

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

16247923840 is an equidigital number, since it uses as much as digits as its factorization.

16247923840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25387400 (or 25387388 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 16247923840 in words is "sixteen billion, two hundred forty-seven million, nine hundred twenty-three thousand, eight hundred forty".