20323116 has 48 divisors (see below), whose sum is σ = 57482880. Its totient is φ = 6158160.

The previous prime is 20323091. The next prime is 20323139. The reversal of 20323116 is 61132302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7366 + ... + 9741.

It is an arithmetic number, because the mean of its divisors is an integer number (1197560).

Almost surely, 2^20323116 is an apocalyptic number.

It is an amenable number.

20323116 is an abundant number, since it is smaller than the sum of its proper divisors (37159764).

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

20323116 is a wasteful number, since it uses less digits than its factorization.

20323116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17131 (or 17123 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20323116 is about 4508.1166799452. The cubic root of 20323116 is about 272.8957457252.

Adding to 20323116 its reverse (61132302), we get a palindrome (81455418).

The spelling of 20323116 in words is "twenty million, three hundred twenty-three thousand, one hundred sixteen".