16634920 has 16 divisors (see below), whose sum is σ = 37428660. Its totient is φ = 6653952.

The previous prime is 16634897. The next prime is 16634921. The reversal of 16634920 is 2943661.

It can be written as a sum of positive squares in 2 ways, for example, as 16305444 + 329476 = 4038^2 + 574^2 .

It is not an unprimeable number, because it can be changed into a prime (16634921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207897 + ... + 207976.

Almost surely, 2^16634920 is an apocalyptic number.

16634920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16634920 is an abundant number, since it is smaller than the sum of its proper divisors (20793740).

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

16634920 is a wasteful number, since it uses less digits than its factorization.

16634920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415884 (or 415880 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 16634920 is about 4078.5928946145. The cubic root of 16634920 is about 255.2741892446.

The spelling of 16634920 in words is "sixteen million, six hundred thirty-four thousand, nine hundred twenty".