20001513252 has 72 divisors (see below), whose sum is σ = 54334185696. Its totient is φ = 5710048512.

The previous prime is 20001513227. The next prime is 20001513269. The reversal of 20001513252 is 25231510002.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 741148 + ... + 767660.

It is an arithmetic number, because the mean of its divisors is an integer number (754641468).

Almost surely, 2^20001513252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001513252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27167092848).

20001513252 is an abundant number, since it is smaller than the sum of its proper divisors (34332672444).

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

20001513252 is a wasteful number, since it uses less digits than its factorization.

20001513252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27817 (or 27808 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The spelling of 20001513252 in words is "twenty billion, one million, five hundred thirteen thousand, two hundred fifty-two".