20125425550 has 12 divisors (see below), whose sum is σ = 37433291616. Its totient is φ = 8050170200.

The previous prime is 20125425547. The next prime is 20125425557. The reversal of 20125425550 is 5552452102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125425557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201254206 + ... + 201254305.

It is an arithmetic number, because the mean of its divisors is an integer number (3119440968).

Almost surely, 2^20125425550 is an apocalyptic number.

20125425550 is a deficient number, since it is larger than the sum of its proper divisors (17307866066).

20125425550 is a wasteful number, since it uses less digits than its factorization.

20125425550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402508523 (or 402508518 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

Adding to 20125425550 its reverse (5552452102), we get a palindrome (25677877652).

The spelling of 20125425550 in words is "twenty billion, one hundred twenty-five million, four hundred twenty-five thousand, five hundred fifty".