20620642 has 16 divisors (see below), whose sum is σ = 36490752. Its totient is φ = 8552160.

The previous prime is 20620637. The next prime is 20620651. The reversal of 20620642 is 24602602.

It is a happy number.

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, 23323 + ... + 24190.

It is an arithmetic number, because the mean of its divisors is an integer number (2280672).

Almost surely, 2^20620642 is an apocalyptic number.

20620642 is a deficient number, since it is larger than the sum of its proper divisors (15870110).

20620642 is a wasteful number, since it uses less digits than its factorization.

20620642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47553.

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

The square root of 20620642 is about 4540.9957057896. The cubic root of 20620642 is about 274.2210108776.

The spelling of 20620642 in words is "twenty million, six hundred twenty thousand, six hundred forty-two".