23440421220 has 96 divisors (see below), whose sum is σ = 71316295680. Its totient is φ = 5730756480.

The previous prime is 23440421209. The next prime is 23440421269. The reversal of 23440421220 is 2212404432.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296302 + ... + 366981.

It is an arithmetic number, because the mean of its divisors is an integer number (742878080).

Almost surely, 2^23440421220 is an apocalyptic number.

23440421220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23440421220 is an abundant number, since it is smaller than the sum of its proper divisors (47875874460).

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

23440421220 is a wasteful number, since it uses less digits than its factorization.

23440421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663345 (or 663343 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 23440421220 its reverse (2212404432), we get a palindrome (25652825652).

The spelling of 23440421220 in words is "twenty-three billion, four hundred forty million, four hundred twenty-one thousand, two hundred twenty".