20525002550 has 48 divisors (see below), whose sum is σ = 41131950720. Its totient is φ = 7574999040.

The previous prime is 20525002549. The next prime is 20525002559. The reversal of 20525002550 is 5520052502.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525002559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1741979 + ... + 1753721.

It is an arithmetic number, because the mean of its divisors is an integer number (856915640).

Almost surely, 2^20525002550 is an apocalyptic number.

20525002550 is an abundant number, since it is smaller than the sum of its proper divisors (20606948170).

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

20525002550 is a wasteful number, since it uses less digits than its factorization.

20525002550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14457 (or 14452 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 26.

The spelling of 20525002550 in words is "twenty billion, five hundred twenty-five million, two thousand, five hundred fifty".