20225235525 has 24 divisors (see below), whose sum is σ = 36478971744. Its totient is φ = 9806174400.

The previous prime is 20225235523. The next prime is 20225235553. The reversal of 20225235525 is 52553252202.

It is a happy number.

It is not a de Polignac number, because 20225235525 - 2¹ = 20225235523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225235523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12256894 + ... + 12258543.

It is an arithmetic number, because the mean of its divisors is an integer number (1519957156).

Almost surely, 2^20225235525 is an apocalyptic number.

20225235525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20225235525 is a deficient number, since it is larger than the sum of its proper divisors (16253736219).

20225235525 is a wasteful number, since it uses less digits than its factorization.

20225235525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24515461 (or 24515456 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 33.

Adding to 20225235525 its reverse (52553252202), we get a palindrome (72778487727).

The spelling of 20225235525 in words is "twenty billion, two hundred twenty-five million, two hundred thirty-five thousand, five hundred twenty-five".