20423336 has 8 divisors (see below), whose sum is σ = 38293770. Its totient is φ = 10211664.

The previous prime is 20423329. The next prime is 20423353. The reversal of 20423336 is 63332402.

It can be written as a sum of positive squares in only one way, i.e., 18748900 + 1674436 = 4330^2 + 1294^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20423336² = 834225306737792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276451 + ... + 1276466.

Almost surely, 2^20423336 is an apocalyptic number.

It is an amenable number.

20423336 is a deficient number, since it is larger than the sum of its proper divisors (17870434).

20423336 is a wasteful number, since it uses less digits than its factorization.

20423336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552923 (or 2552919 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 20423336 is about 4519.2185165137. The cubic root of 20423336 is about 273.3435900705.

Adding to 20423336 its reverse (63332402), we get a palindrome (83755738).

The spelling of 20423336 in words is "twenty million, four hundred twenty-three thousand, three hundred thirty-six".