21628048180 has 24 divisors (see below), whose sum is σ = 45423705600. Its totient is φ = 8650304160.

The previous prime is 21628048171. The next prime is 21628048181. The reversal of 21628048180 is 8184082612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21628048181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155985 + ... + 259975.

It is an arithmetic number, because the mean of its divisors is an integer number (1892654400).

Almost surely, 2^21628048180 is an apocalyptic number.

21628048180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21628048180 is an abundant number, since it is smaller than the sum of its proper divisors (23795657420).

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

21628048180 is a wasteful number, since it uses less digits than its factorization.

21628048180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114399 (or 114397 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The spelling of 21628048180 in words is "twenty-one billion, six hundred twenty-eight million, forty-eight thousand, one hundred eighty".