21353932182 has 256 divisors, whose sum is σ = 52494925824. Its totient is φ = 5721408000.

The previous prime is 21353932157. The next prime is 21353932189. The reversal of 21353932182 is 28123935312.

It is a super-2 number, since 2×21353932182² (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 21353932182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21353932189) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 123433048 + ... + 123433220.

It is an arithmetic number, because the mean of its divisors is an integer number (205058304).

Almost surely, 2^21353932182 is an apocalyptic number.

21353932182 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21353932182, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26247462912).

21353932182 is an abundant number, since it is smaller than the sum of its proper divisors (31140993642).

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

21353932182 is a wasteful number, since it uses less digits than its factorization.

21353932182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347.

The product of its digits is 77760, while the sum is 39.

The spelling of 21353932182 in words is "twenty-one billion, three hundred fifty-three million, nine hundred thirty-two thousand, one hundred eighty-two".