23220434040 has 32 divisors (see below), whose sum is σ = 69661302480. Its totient is φ = 6192115712.

The previous prime is 23220433997. The next prime is 23220434089. The reversal of 23220434040 is 4043402232.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23220434040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96751689 + ... + 96751928.

Almost surely, 2^23220434040 is an apocalyptic number.

23220434040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23220434040 is an abundant number, since it is smaller than the sum of its proper divisors (46440868440).

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

23220434040 is a wasteful number, since it uses less digits than its factorization.

23220434040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193503631 (or 193503627 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 23220434040 its reverse (4043402232), we get a palindrome (27263836272).

The spelling of 23220434040 in words is "twenty-three billion, two hundred twenty million, four hundred thirty-four thousand, forty".