23220403254440 has 64 divisors (see below), whose sum is σ = 59757415200000. Its totient is φ = 7954906871808.

The previous prime is 23220403254361. The next prime is 23220403254443. The reversal of 23220403254440 is 4445230402232.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 23220403254440.

It is not an unprimeable number, because it can be changed into a prime (23220403254443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32848844 + ... + 33548283.

It is an arithmetic number, because the mean of its divisors is an integer number (933709612500).

Almost surely, 2^{23220403254440} is an apocalyptic number.

23220403254440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23220403254440 is an abundant number, since it is smaller than the sum of its proper divisors (36537011945560).

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

23220403254440 is a wasteful number, since it uses less digits than its factorization.

23220403254440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66398394 (or 66398390 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 35.

Adding to 23220403254440 its reverse (4445230402232), we get a palindrome (27665633656672).

The spelling of 23220403254440 in words is "twenty-three trillion, two hundred twenty billion, four hundred three million, two hundred fifty-four thousand, four hundred forty".