22691748240 has 720 divisors, whose sum is σ = 96110431872. Its totient is φ = 4873125888.

The previous prime is 22691748173. The next prime is 22691748259. The reversal of 22691748240 is 4284719622.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 39326832 + ... + 39327408.

Almost surely, 2^22691748240 is an apocalyptic number.

22691748240 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 22691748240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48055215936).

22691748240 is an abundant number, since it is smaller than the sum of its proper divisors (73418683632).

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

22691748240 is a wasteful number, since it uses less digits than its factorization.

22691748240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 22691748240 in words is "twenty-two billion, six hundred ninety-one million, seven hundred forty-eight thousand, two hundred forty".