23204342440 has 32 divisors (see below), whose sum is σ = 55280935080. Its totient is φ = 8735752192.

The previous prime is 23204342437. The next prime is 23204342443. The reversal of 23204342440 is 4424340232.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23204342437) and next prime (23204342443).

It can be written as a sum of positive squares in 4 ways, for example, as 14261614084 + 8942728356 = 119422^2 + 94566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23204342399 and 23204342408.

It is not an unprimeable number, because it can be changed into a prime (23204342443) 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, 17061337 + ... + 17062696.

Almost surely, 2^23204342440 is an apocalyptic number.

23204342440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23204342440 is an abundant number, since it is smaller than the sum of its proper divisors (32076592640).

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

23204342440 is a wasteful number, since it uses less digits than its factorization.

23204342440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34124061 (or 34124057 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 23204342440 its reverse (4424340232), we get a palindrome (27628682672).

The spelling of 23204342440 in words is "twenty-three billion, two hundred four million, three hundred forty-two thousand, four hundred forty".