20205251528 has 96 divisors (see below), whose sum is σ = 48128592960. Its totient is φ = 7863649920.

The previous prime is 20205251503. The next prime is 20205251603. The reversal of 20205251528 is 82515250202.

It is a junction number, because it is equal to n+sod(n) for n = 20205251494 and 20205251503.

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, 5228525 + ... + 5232387.

It is an arithmetic number, because the mean of its divisors is an integer number (501339510).

Almost surely, 2^20205251528 is an apocalyptic number.

20205251528 is a gapful number since it is divisible by the number (28) 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 20205251528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24064296480).

20205251528 is an abundant number, since it is smaller than the sum of its proper divisors (27923341432).

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

20205251528 is a wasteful number, since it uses less digits than its factorization.

20205251528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5107 (or 5096 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 20205251528 in words is "twenty billion, two hundred five million, two hundred fifty-one thousand, five hundred twenty-eight".