21346604 has 24 divisors (see below), whose sum is σ = 38208240. Its totient is φ = 10433024.

The previous prime is 21346573. The next prime is 21346621. The reversal of 21346604 is 40664312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37232 + ... + 37800.

It is an arithmetic number, because the mean of its divisors is an integer number (1592010).

Almost surely, 2^21346604 is an apocalyptic number.

It is an amenable number.

21346604 is a deficient number, since it is larger than the sum of its proper divisors (16861636).

21346604 is a wasteful number, since it uses less digits than its factorization.

21346604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 21346604 is about 4620.2385219813. The cubic root of 21346604 is about 277.4020063594.

The spelling of 21346604 in words is "twenty-one million, three hundred forty-six thousand, six hundred four".