22648635220 has 96 divisors (see below), whose sum is σ = 51499476000. Its totient is φ = 8363743232.

The previous prime is 22648635199. The next prime is 22648635281. The reversal of 22648635220 is 2253684622.

It can be written as a sum of positive squares in 16 ways, for example, as 7568304016 + 15080331204 = 86996^2 + 122802^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5205606 + ... + 5209954.

It is an arithmetic number, because the mean of its divisors is an integer number (536452875).

Almost surely, 2^22648635220 is an apocalyptic number.

22648635220 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 22648635220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25749738000).

22648635220 is an abundant number, since it is smaller than the sum of its proper divisors (28850840780).

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

22648635220 is a wasteful number, since it uses less digits than its factorization.

22648635220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462 (or 4426 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 22648635220 in words is "twenty-two billion, six hundred forty-eight million, six hundred thirty-five thousand, two hundred twenty".