20311192 has 32 divisors (see below), whose sum is σ = 43992720. Its totient is φ = 8688640.

The previous prime is 20311189. The next prime is 20311211. The reversal of 20311192 is 29111302.

It is a congruent number.

It is an unprimeable number.

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, 5293 + ... + 8284.

Almost surely, 2^20311192 is an apocalyptic number.

20311192 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20311192 is an abundant number, since it is smaller than the sum of its proper divisors (23681528).

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

20311192 is a wasteful number, since it uses less digits than its factorization.

20311192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13611 (or 13607 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 20311192 is about 4506.7939824225. The cubic root of 20311192 is about 272.8423640574.

Adding to 20311192 its reverse (29111302), we get a palindrome (49422494).

It can be divided in two parts, 203111 and 92, that added together give a triangular number (203203 = T₆₃₇).

The spelling of 20311192 in words is "twenty million, three hundred eleven thousand, one hundred ninety-two".