20125204530 has 64 divisors (see below), whose sum is σ = 49994703360. Its totient is φ = 5178688256.

The previous prime is 20125204507. The next prime is 20125204543. The reversal of 20125204530 is 3540252102.

It is a self number, because there is not a number n which added to its sum of digits gives 20125204530.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1789204 + ... + 1800416.

It is an arithmetic number, because the mean of its divisors is an integer number (781167240).

Almost surely, 2^20125204530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20125204530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24997351680).

20125204530 is an abundant number, since it is smaller than the sum of its proper divisors (29869498830).

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

20125204530 is a wasteful number, since it uses less digits than its factorization.

20125204530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13315.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20125204530 its reverse (3540252102), we get a palindrome (23665456632).

The spelling of 20125204530 in words is "twenty billion, one hundred twenty-five million, two hundred four thousand, five hundred thirty".