20618622 has 12 divisors (see below), whose sum is σ = 44673720. Its totient is φ = 6872868.

The previous prime is 20618621. The next prime is 20618639. The reversal of 20618622 is 22681602.

20618622 is a `hidden beast` number, since 20 + 6 + 18 + 622 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20618621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 572722 + ... + 572757.

It is an arithmetic number, because the mean of its divisors is an integer number (3722810).

Almost surely, 2^20618622 is an apocalyptic number.

20618622 is an abundant number, since it is smaller than the sum of its proper divisors (24055098).

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

20618622 is a wasteful number, since it uses less digits than its factorization.

20618622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145487 (or 1145484 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20618622 is about 4540.7732821624. The cubic root of 20618622 is about 274.2120563467.

The spelling of 20618622 in words is "twenty million, six hundred eighteen thousand, six hundred twenty-two".