16621432204 has 48 divisors (see below), whose sum is σ = 31791513600. Its totient is φ = 7557615936.

The previous prime is 16621432193. The next prime is 16621432231. The reversal of 16621432204 is 40223412661.

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, 1963509 + ... + 1971955.

It is an arithmetic number, because the mean of its divisors is an integer number (662323200).

Almost surely, 2^16621432204 is an apocalyptic number.

It is an amenable number.

16621432204 is a deficient number, since it is larger than the sum of its proper divisors (15170081396).

16621432204 is a wasteful number, since it uses less digits than its factorization.

16621432204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9022 (or 9020 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 16621432204 its reverse (40223412661), we get a palindrome (56844844865).

The spelling of 16621432204 in words is "sixteen billion, six hundred twenty-one million, four hundred thirty-two thousand, two hundred four".