20225440100 has 36 divisors (see below), whose sum is σ = 44006951604. Its totient is φ = 8068471680.

The previous prime is 20225440087. The next prime is 20225440117. The reversal of 20225440100 is 104452202.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 739513636 + 19485926464 = 27194^2 + 139592^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233819 + ... + 308418.

Almost surely, 2^20225440100 is an apocalyptic number.

20225440100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20225440100 is an abundant number, since it is smaller than the sum of its proper divisors (23781511504).

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

20225440100 is a wasteful number, since it uses less digits than its factorization.

20225440100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542624 (or 542617 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 20225440100 its reverse (104452202), we get a palindrome (20329892302).

The spelling of 20225440100 in words is "twenty billion, two hundred twenty-five million, four hundred forty thousand, one hundred".