20623236 has 24 divisors (see below), whose sum is σ = 48565440. Its totient is φ = 6810912.

The previous prime is 20623231. The next prime is 20623237. The reversal of 20623236 is 63232602.

It is a super-2 number, since 2×20623236² = 850635726223392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20623231) 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 7 ways as a sum of consecutive naturals, for example, 6576 + ... + 9191.

It is an arithmetic number, because the mean of its divisors is an integer number (2023560).

Almost surely, 2^20623236 is an apocalyptic number.

It is an amenable number.

20623236 is an abundant number, since it is smaller than the sum of its proper divisors (27942204).

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

20623236 is a wasteful number, since it uses less digits than its factorization.

20623236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15883 (or 15881 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 20623236 is about 4541.2813169853. The cubic root of 20623236 is about 274.2325090563.

Adding to 20623236 its reverse (63232602), we get a palindrome (83855838).

The spelling of 20623236 in words is "twenty million, six hundred twenty-three thousand, two hundred thirty-six".