20620668 has 12 divisors (see below), whose sum is σ = 48114920. Its totient is φ = 6873552.

The previous prime is 20620667. The next prime is 20620669. The reversal of 20620668 is 86602602.

It is an interprime number because it is at equal distance from previous prime (20620667) and next prime (20620669).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620667) 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, 859183 + ... + 859206.

Almost surely, 2^20620668 is an apocalyptic number.

It is an amenable number.

20620668 is an abundant number, since it is smaller than the sum of its proper divisors (27494252).

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

20620668 is a wasteful number, since it uses less digits than its factorization.

20620668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718396 (or 1718394 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20620668 is about 4540.9985685970. The cubic root of 20620668 is about 274.2211261302.

The spelling of 20620668 in words is "twenty million, six hundred twenty thousand, six hundred sixty-eight".