20506608 has 50 divisors (see below), whose sum is σ = 59355824. Its totient is φ = 6835104.

The previous prime is 20506597. The next prime is 20506631. The reversal of 20506608 is 80660502.

20506608 is a `hidden beast` number, since 2 + 0 + 50 + 6 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6616 + ... + 9207.

Almost surely, 2^20506608 is an apocalyptic number.

It is an amenable number.

20506608 is an abundant number, since it is smaller than the sum of its proper divisors (38849216).

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

20506608 is a wasteful number, since it uses less digits than its factorization.

20506608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15843 (or 15828 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20506608 is about 4528.4222417968. The cubic root of 20506608 is about 273.7145872750.

The spelling of 20506608 in words is "twenty million, five hundred six thousand, six hundred eight".