20533229180 has 24 divisors (see below), whose sum is σ = 44285182368. Its totient is φ = 7991310528.

The previous prime is 20533229173. The next prime is 20533229191. The reversal of 20533229180 is 8192233502.

It is a super-2 number, since 2×20533229180² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20533229180.

It is a congruent number.

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, 13873064 + ... + 13874543.

It is an arithmetic number, because the mean of its divisors is an integer number (1845215932).

Almost surely, 2^20533229180 is an apocalyptic number.

20533229180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20533229180 is an abundant number, since it is smaller than the sum of its proper divisors (23751953188).

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

20533229180 is a wasteful number, since it uses less digits than its factorization.

20533229180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27747653 (or 27747651 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 20533229180 in words is "twenty billion, five hundred thirty-three million, two hundred twenty-nine thousand, one hundred eighty".