20818422 has 24 divisors (see below), whose sum is σ = 46562880. Its totient is φ = 6715440.

The previous prime is 20818409. The next prime is 20818459. The reversal of 20818422 is 22481802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18097 + ... + 19212.

It is an arithmetic number, because the mean of its divisors is an integer number (1940120).

Almost surely, 2^20818422 is an apocalyptic number.

20818422 is an abundant number, since it is smaller than the sum of its proper divisors (25744458).

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

20818422 is a wasteful number, since it uses less digits than its factorization.

20818422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37348 (or 37345 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 20818422 is about 4562.7208987621. The cubic root of 20818422 is about 275.0949402221.

The spelling of 20818422 in words is "twenty million, eight hundred eighteen thousand, four hundred twenty-two".