20622808 has 8 divisors (see below), whose sum is σ = 38667780. Its totient is φ = 10311400.

The previous prime is 20622803. The next prime is 20622821. The reversal of 20622808 is 80822602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20622803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1288918 + ... + 1288933.

Almost surely, 2^20622808 is an apocalyptic number.

It is an amenable number.

20622808 is a deficient number, since it is larger than the sum of its proper divisors (18044972).

20622808 is a wasteful number, since it uses less digits than its factorization.

20622808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577857 (or 2577853 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20622808 is about 4541.2341934765. The cubic root of 20622808 is about 274.2306119676.

The spelling of 20622808 in words is "twenty million, six hundred twenty-two thousand, eight hundred eight".