25513432340 has 24 divisors (see below), whose sum is σ = 58448954592. Its totient is φ = 9277611680.

The previous prime is 25513432309. The next prime is 25513432361. The reversal of 25513432340 is 4323431552.

It is a junction number, because it is equal to n+sod(n) for n = 25513432297 and 25513432306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57984854 + ... + 57985293.

It is an arithmetic number, because the mean of its divisors is an integer number (2435373108).

Almost surely, 2^25513432340 is an apocalyptic number.

25513432340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25513432340 is an abundant number, since it is smaller than the sum of its proper divisors (32935522252).

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

25513432340 is a wasteful number, since it uses less digits than its factorization.

25513432340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115970167 (or 115970165 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 25513432340 its reverse (4323431552), we get a palindrome (29836863892).

The spelling of 25513432340 in words is "twenty-five billion, five hundred thirteen million, four hundred thirty-two thousand, three hundred forty".