23254535440 has 80 divisors (see below), whose sum is σ = 55126636848. Its totient is φ = 9120964608.

The previous prime is 23254535429. The next prime is 23254535441. The reversal of 23254535440 is 4453545232.

It can be written as a sum of positive squares in 8 ways, for example, as 1084516624 + 22170018816 = 32932^2 + 148896^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 23254535440.

It is not an unprimeable number, because it can be changed into a prime (23254535441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 998812 + ... + 1021828.

Almost surely, 2^23254535440 is an apocalyptic number.

23254535440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23254535440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27563318424).

23254535440 is an abundant number, since it is smaller than the sum of its proper divisors (31872101408).

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

23254535440 is a wasteful number, since it uses less digits than its factorization.

23254535440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23276 (or 23270 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 37.

The spelling of 23254535440 in words is "twenty-three billion, two hundred fifty-four million, five hundred thirty-five thousand, four hundred forty".