13012157532 has 72 divisors (see below), whose sum is σ = 33441520000. Its totient is φ = 3934956960.

The previous prime is 13012157519. The next prime is 13012157539. The reversal of 13012157532 is 23575121031.

It is a self number, because there is not a number n which added to its sum of digits gives 13012157532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012157539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 715569 + ... + 733527.

Almost surely, 2^13012157532 is an apocalyptic number.

13012157532 is a gapful number since it is divisible by the number (12) 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 13012157532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16720760000).

13012157532 is an abundant number, since it is smaller than the sum of its proper divisors (20429362468).

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

13012157532 is a wasteful number, since it uses less digits than its factorization.

13012157532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18487 (or 18474 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

Adding to 13012157532 its reverse (23575121031), we get a palindrome (36587278563).

The spelling of 13012157532 in words is "thirteen billion, twelve million, one hundred fifty-seven thousand, five hundred thirty-two".