20225400164 has 24 divisors (see below), whose sum is σ = 35751576000. Its totient is φ = 10011083040.

The previous prime is 20225400131. The next prime is 20225400179. The reversal of 20225400164 is 46100452202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141929 + ... + 246159.

It is an arithmetic number, because the mean of its divisors is an integer number (1489649000).

Almost surely, 2^20225400164 is an apocalyptic number.

It is an amenable number.

20225400164 is a deficient number, since it is larger than the sum of its proper divisors (15526175836).

20225400164 is a wasteful number, since it uses less digits than its factorization.

20225400164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104723 (or 104721 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 20225400164 its reverse (46100452202), we get a palindrome (66325852366).

The spelling of 20225400164 in words is "twenty billion, two hundred twenty-five million, four hundred thousand, one hundred sixty-four".