20361993180 has 192 divisors, whose sum is σ = 60248361600. Its totient is φ = 5131468800.

The previous prime is 20361993163. The next prime is 20361993191. The reversal of 20361993180 is 8139916302.

It is a super-2 number, since 2×20361993180² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31765660 + ... + 31766300.

It is an arithmetic number, because the mean of its divisors is an integer number (313793550).

Almost surely, 2^20361993180 is an apocalyptic number.

20361993180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20361993180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30124180800).

20361993180 is an abundant number, since it is smaller than the sum of its proper divisors (39886368420).

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

20361993180 is a wasteful number, since it uses less digits than its factorization.

20361993180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 20361993180 in words is "twenty billion, three hundred sixty-one million, nine hundred ninety-three thousand, one hundred eighty".