20525050404 has 168 divisors, whose sum is σ = 55587942648. Its totient is φ = 6623285760.

The previous prime is 20525050397. The next prime is 20525050417. The reversal of 20525050404 is 40405052502.

20525050404 is a `hidden beast` number, since 2 + 0 + 5 + 250 + 5 + 0 + 404 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15695078400 + 4829972004 = 125280^2 + 69498^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 30317314 + ... + 30317990.

It is an arithmetic number, because the mean of its divisors is an integer number (330880611).

Almost surely, 2^20525050404 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 20525050404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27793971324).

20525050404 is an abundant number, since it is smaller than the sum of its proper divisors (35062892244).

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

20525050404 is a wasteful number, since it uses less digits than its factorization.

20525050404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The spelling of 20525050404 in words is "twenty billion, five hundred twenty-five million, fifty thousand, four hundred four".