20638822 has 8 divisors (see below), whose sum is σ = 31795056. Its totient is φ = 10040472.

The previous prime is 20638819. The next prime is 20638853. The reversal of 20638822 is 22883602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139378 + ... + 139525.

It is an arithmetic number, because the mean of its divisors is an integer number (3974382).

Almost surely, 2^20638822 is an apocalyptic number.

20638822 is a deficient number, since it is larger than the sum of its proper divisors (11156234).

20638822 is a wasteful number, since it uses less digits than its factorization.

20638822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278942.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20638822 is about 4542.9970283944. The cubic root of 20638822 is about 274.3015753528.

The spelling of 20638822 in words is "twenty million, six hundred thirty-eight thousand, eight hundred twenty-two".