16621146 has 32 divisors (see below), whose sum is σ = 38131200. Its totient is φ = 5361120.

The previous prime is 16621139. The next prime is 16621183. The reversal of 16621146 is 64112661.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 3291 + ... + 6638.

It is an arithmetic number, because the mean of its divisors is an integer number (1191600).

Almost surely, 2^16621146 is an apocalyptic number.

16621146 is an abundant number, since it is smaller than the sum of its proper divisors (21510054).

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

16621146 is a wasteful number, since it uses less digits than its factorization.

16621146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9971 (or 9965 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 16621146 is about 4076.9039723790. The cubic root of 16621146 is about 255.2037126486.

It can be divided in two parts, 166 and 21146, that added together give a palindrome (21312).

The spelling of 16621146 in words is "sixteen million, six hundred twenty-one thousand, one hundred forty-six".