20223997 has 8 divisors (see below), whose sum is σ = 20970752. Its totient is φ = 19483200.

The previous prime is 20223989. The next prime is 20224007. The reversal of 20223997 is 79932202.

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

It is a cyclic number.

It is not a de Polignac number, because 20223997 - 2³ = 20223989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6118 + ... + 8824.

It is an arithmetic number, because the mean of its divisors is an integer number (2621344).

Almost surely, 2^20223997 is an apocalyptic number.

It is an amenable number.

20223997 is a deficient number, since it is larger than the sum of its proper divisors (746755).

20223997 is a wasteful number, since it uses less digits than its factorization.

20223997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20223997 is about 4497.1098496701. The cubic root of 20223997 is about 272.4513708359.

The spelling of 20223997 in words is "twenty million, two hundred twenty-three thousand, nine hundred ninety-seven".