23022430640 has 80 divisors (see below), whose sum is σ = 58929219360. Its totient is φ = 8294952960.

The previous prime is 23022430633. The next prime is 23022430661. The reversal of 23022430640 is 4603422032.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×23022430640² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24089 + ... + 215928.

It is an arithmetic number, because the mean of its divisors is an integer number (736615242).

Almost surely, 2^23022430640 is an apocalyptic number.

23022430640 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 23022430640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29464609680).

23022430640 is an abundant number, since it is smaller than the sum of its proper divisors (35906788720).

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

23022430640 is a wasteful number, since it uses less digits than its factorization.

23022430640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240150 (or 240144 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 23022430640 its reverse (4603422032), we get a palindrome (27625852672).

The spelling of 23022430640 in words is "twenty-three billion, twenty-two million, four hundred thirty thousand, six hundred forty".