23144420325520 has 80 divisors (see below), whose sum is σ = 59363484212592. Its totient is φ = 8337202053120.

The previous prime is 23144420325503. The next prime is 23144420325553. The reversal of 23144420325520 is 2552302444132.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11980348477696 + 11164071847824 = 3461264^2 + 3341268^2 .

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 23144420325520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271350657 + ... + 271435936.

Almost surely, 2^{23144420325520} is an apocalyptic number.

23144420325520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23144420325520 is an abundant number, since it is smaller than the sum of its proper divisors (36219063887072).

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

23144420325520 is a wasteful number, since it uses less digits than its factorization.

23144420325520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542786660 (or 542786654 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 23144420325520 its reverse (2552302444132), we get a palindrome (25696722769652).

The spelling of 23144420325520 in words is "twenty-three trillion, one hundred forty-four billion, four hundred twenty million, three hundred twenty-five thousand, five hundred twenty".