22621847640 has 768 divisors, whose sum is σ = 90360230400. Its totient is φ = 4486938624.

The previous prime is 22621847627. The next prime is 22621847653. The reversal of 22621847640 is 4674812622.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22621847627) and next prime (22621847653).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 22621847592 and 22621847601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 81667182 + ... + 81667458.

It is an arithmetic number, because the mean of its divisors is an integer number (117656550).

Almost surely, 2^22621847640 is an apocalyptic number.

22621847640 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 22621847640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45180115200).

22621847640 is an abundant number, since it is smaller than the sum of its proper divisors (67738382760).

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

22621847640 is a wasteful number, since it uses less digits than its factorization.

22621847640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 22621847640 in words is "twenty-two billion, six hundred twenty-one million, eight hundred forty-seven thousand, six hundred forty".