23221012040 has 32 divisors (see below), whose sum is σ = 53659369080. Its totient is φ = 9037366272.

The previous prime is 23221012039. The next prime is 23221012043. The reversal of 23221012040 is 4021012232.

It can be written as a sum of positive squares in 4 ways, for example, as 21017460676 + 2203551364 = 144974^2 + 46942^2 .

It is not an unprimeable number, because it can be changed into a prime (23221012043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7843457 + ... + 7846416.

Almost surely, 2^23221012040 is an apocalyptic number.

23221012040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23221012040 is an abundant number, since it is smaller than the sum of its proper divisors (30438357040).

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

23221012040 is a wasteful number, since it uses less digits than its factorization.

23221012040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15689921 (or 15689917 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 23221012040 its product of nonzero digits (192), we get a palindrome (23221012232).

Adding to 23221012040 its reverse (4021012232), we get a palindrome (27242024272).

The spelling of 23221012040 in words is "twenty-three billion, two hundred twenty-one million, twelve thousand, forty".