20423244 has 24 divisors (see below), whose sum is σ = 47734960. Its totient is φ = 6796224.

The previous prime is 20423231. The next prime is 20423257. The reversal of 20423244 is 44232402.

It is an interprime number because it is at equal distance from previous prime (20423231) and next prime (20423257).

It is a self number, because there is not a number n which added to its sum of digits gives 20423244.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8922 + ... + 10974.

Almost surely, 2^20423244 is an apocalyptic number.

It is an amenable number.

20423244 is an abundant number, since it is smaller than the sum of its proper divisors (27311716).

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

20423244 is a wasteful number, since it uses less digits than its factorization.

20423244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889 (or 2887 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 20423244 is about 4519.2083377512. The cubic root of 20423244 is about 273.3431796308.

Adding to 20423244 its reverse (44232402), we get a palindrome (64655646).

The spelling of 20423244 in words is "twenty million, four hundred twenty-three thousand, two hundred forty-four".