11172165020 has 24 divisors (see below), whose sum is σ = 24218371968. Its totient is φ = 4324708800.

The previous prime is 11172164953. The next prime is 11172165029. The reversal of 11172165020 is 2056127111.

It is a super-2 number, since 2×11172165020² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11172165029) 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, 9009191 + ... + 9010430.

It is an arithmetic number, because the mean of its divisors is an integer number (1009098832).

Almost surely, 2^11172165020 is an apocalyptic number.

11172165020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11172165020 is an abundant number, since it is smaller than the sum of its proper divisors (13046206948).

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

11172165020 is a wasteful number, since it uses less digits than its factorization.

11172165020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18019661 (or 18019659 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 26.

The spelling of 11172165020 in words is "eleven billion, one hundred seventy-two million, one hundred sixty-five thousand, twenty".