16320431900 has 72 divisors (see below), whose sum is σ = 37530150000. Its totient is φ = 6142970880.

The previous prime is 16320431899. The next prime is 16320431917. The reversal of 16320431900 is 913402361.

It is a super-2 number, since 2×16320431900² (a number of 21 digits) contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254276 + ... + 311924.

Almost surely, 2^16320431900 is an apocalyptic number.

16320431900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16320431900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18765075000).

16320431900 is an abundant number, since it is smaller than the sum of its proper divisors (21209718100).

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

16320431900 is a wasteful number, since it uses less digits than its factorization.

16320431900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57831 (or 57824 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 16320431900 in words is "sixteen billion, three hundred twenty million, four hundred thirty-one thousand, nine hundred".