20663922 has 8 divisors (see below), whose sum is σ = 41327856. Its totient is φ = 6887972.

The previous prime is 20663861. The next prime is 20663927. The reversal of 20663922 is 22936602.

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

20663922 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20663922.

It is not an unprimeable number, because it can be changed into a prime (20663927) 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, 1721988 + ... + 1721999.

It is an arithmetic number, because the mean of its divisors is an integer number (5165982).

Almost surely, 2^20663922 is an apocalyptic number.

20663922 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20663922 is a wasteful number, since it uses less digits than its factorization.

20663922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3443992.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 20663922 is about 4545.7586825523. The cubic root of 20663922 is about 274.4127280204.

The spelling of 20663922 in words is "twenty million, six hundred sixty-three thousand, nine hundred twenty-two".