16420904 has 16 divisors (see below), whose sum is σ = 31012800. Its totient is φ = 8150832.

The previous prime is 16420897. The next prime is 16420913. The reversal of 16420904 is 40902461.

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, 6272 + ... + 8495.

It is an arithmetic number, because the mean of its divisors is an integer number (1938300).

Almost surely, 2^16420904 is an apocalyptic number.

It is an amenable number.

16420904 is a deficient number, since it is larger than the sum of its proper divisors (14591896).

16420904 is a wasteful number, since it uses less digits than its factorization.

16420904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14912 (or 14908 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 16420904 is about 4052.2714617854. The cubic root of 16420904 is about 254.1747201366.

The spelling of 16420904 in words is "sixteen million, four hundred twenty thousand, nine hundred four".