20406604 has 12 divisors (see below), whose sum is σ = 36943200. Its totient is φ = 9851408.

The previous prime is 20406563. The next prime is 20406611. The reversal of 20406604 is 40660402.

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, 87844 + ... + 88075.

It is an arithmetic number, because the mean of its divisors is an integer number (3078600).

Almost surely, 2^20406604 is an apocalyptic number.

It is an amenable number.

20406604 is a deficient number, since it is larger than the sum of its proper divisors (16536596).

20406604 is a wasteful number, since it uses less digits than its factorization.

20406604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175952 (or 175950 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20406604 is about 4517.3669321852. The cubic root of 20406604 is about 273.2689232857.

The spelling of 20406604 in words is "twenty million, four hundred six thousand, six hundred four".