16521934 has 32 divisors (see below), whose sum is σ = 29846880. Its totient is φ = 6758400.

The previous prime is 16521919. The next prime is 16521937. The reversal of 16521934 is 43912561.

It is a junction number, because it is equal to n+sod(n) for n = 16521896 and 16521905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16521937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11022 + ... + 12430.

It is an arithmetic number, because the mean of its divisors is an integer number (932715).

Almost surely, 2^16521934 is an apocalyptic number.

16521934 is a deficient number, since it is larger than the sum of its proper divisors (13324946).

16521934 is a wasteful number, since it uses less digits than its factorization.

16521934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476.

The product of its digits is 6480, while the sum is 31.

The square root of 16521934 is about 4064.7181944140. The cubic root of 16521934 is about 254.6949267208.

The spelling of 16521934 in words is "sixteen million, five hundred twenty-one thousand, nine hundred thirty-four".