20535604 has 12 divisors (see below), whose sum is σ = 35977984. Its totient is φ = 10256184.

The previous prime is 20535601. The next prime is 20535607. The reversal of 20535604 is 40653502.

It is an interprime number because it is at equal distance from previous prime (20535601) and next prime (20535607).

It is a super-2 number, since 2×20535604² = 843422063289632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1987 + ... + 6709.

Almost surely, 2^20535604 is an apocalyptic number.

It is an amenable number.

20535604 is a deficient number, since it is larger than the sum of its proper divisors (15442380).

20535604 is a wasteful number, since it uses less digits than its factorization.

20535604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5814 (or 5812 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 20535604 is about 4531.6226674338. The cubic root of 20535604 is about 273.8435357967.

The spelling of 20535604 in words is "twenty million, five hundred thirty-five thousand, six hundred four".