12172292020 has 24 divisors (see below), whose sum is σ = 29213501184. Its totient is φ = 4173357216.

The previous prime is 12172292017. The next prime is 12172292023. The reversal of 12172292020 is 2029227121.

It is an interprime number because it is at equal distance from previous prime (12172292017) and next prime (12172292023).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 12172292020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172292023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43472332 + ... + 43472611.

It is an arithmetic number, because the mean of its divisors is an integer number (1217229216).

Almost surely, 2^12172292020 is an apocalyptic number.

12172292020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12172292020 is an abundant number, since it is smaller than the sum of its proper divisors (17041209164).

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

12172292020 is a wasteful number, since it uses less digits than its factorization.

12172292020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86944959 (or 86944957 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 12172292020 in words is "twelve billion, one hundred seventy-two million, two hundred ninety-two thousand, twenty".