20245521252 has 96 divisors (see below), whose sum is σ = 52530508800. Its totient is φ = 6016873600.

The previous prime is 20245521239. The next prime is 20245521271. The reversal of 20245521252 is 25212554202.

It is a super-2 number, since 2×20245521252² (a number of 21 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 3587449 + ... + 3593087.

It is an arithmetic number, because the mean of its divisors is an integer number (547192800).

Almost surely, 2^20245521252 is an apocalyptic number.

20245521252 is a gapful number since it is divisible by the number (22) 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 20245521252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26265254400).

20245521252 is an abundant number, since it is smaller than the sum of its proper divisors (32284987548).

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

20245521252 is a wasteful number, since it uses less digits than its factorization.

20245521252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6177 (or 6175 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The spelling of 20245521252 in words is "twenty billion, two hundred forty-five million, five hundred twenty-one thousand, two hundred fifty-two".