20552182456 has 64 divisors (see below), whose sum is σ = 42123856320. Its totient is φ = 9343918080.

The previous prime is 20552182451. The next prime is 20552182457. The reversal of 20552182456 is 65428125502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20552182451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2062446 + ... + 2072386.

It is an arithmetic number, because the mean of its divisors is an integer number (658185255).

Almost surely, 2^20552182456 is an apocalyptic number.

20552182456 is a gapful number since it is divisible by the number (26) 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 20552182456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21061928160).

20552182456 is an abundant number, since it is smaller than the sum of its proper divisors (21571673864).

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

20552182456 is a wasteful number, since it uses less digits than its factorization.

20552182456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10256 (or 10252 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 40.

The spelling of 20552182456 in words is "twenty billion, five hundred fifty-two million, one hundred eighty-two thousand, four hundred fifty-six".