20423366 has 32 divisors (see below), whose sum is σ = 34214400. Its totient is φ = 9102240.

The previous prime is 20423357. The next prime is 20423369. The reversal of 20423366 is 66332402.

It is a super-2 number, since 2×20423366² = 834227757539912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47171 + ... + 47601.

It is an arithmetic number, because the mean of its divisors is an integer number (1069200).

Almost surely, 2^20423366 is an apocalyptic number.

20423366 is a deficient number, since it is larger than the sum of its proper divisors (13791034).

20423366 is a wasteful number, since it uses less digits than its factorization.

20423366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 20423366 is about 4519.2218356704. The cubic root of 20423366 is about 273.3437239093.

Adding to 20423366 its reverse (66332402), we get a palindrome (86755768).

The spelling of 20423366 in words is "twenty million, four hundred twenty-three thousand, three hundred sixty-six".