22527820440 has 448 divisors, whose sum is σ = 81237880800. Its totient is φ = 5603198976.

The previous prime is 22527820433. The next prime is 22527820477. The reversal of 22527820440 is 4402872522.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22527820395 and 22527820404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 40444642 + ... + 40445198.

Almost surely, 2^22527820440 is an apocalyptic number.

22527820440 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 22527820440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40618940400).

22527820440 is an abundant number, since it is smaller than the sum of its proper divisors (58710060360).

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

22527820440 is a wasteful number, since it uses less digits than its factorization.

22527820440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 36.

The spelling of 22527820440 in words is "twenty-two billion, five hundred twenty-seven million, eight hundred twenty thousand, four hundred forty".