20169770180 has 24 divisors (see below), whose sum is σ = 48407448768. Its totient is φ = 6915349728.

The previous prime is 20169770147. The next prime is 20169770197. The reversal of 20169770180 is 8107796102.

It is a super-2 number, since 2×20169770180² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72034754 + ... + 72035033.

It is an arithmetic number, because the mean of its divisors is an integer number (2016977032).

Almost surely, 2^20169770180 is an apocalyptic number.

20169770180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20169770180 is an abundant number, since it is smaller than the sum of its proper divisors (28237678588).

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

20169770180 is a wasteful number, since it uses less digits than its factorization.

20169770180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144069803 (or 144069801 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 41.

The spelling of 20169770180 in words is "twenty billion, one hundred sixty-nine million, seven hundred seventy thousand, one hundred eighty".