20104401025100 has 144 divisors (see below), whose sum is σ = 50945534610432. Its totient is φ = 6742862115840.

The previous prime is 20104401025081. The next prime is 20104401025277. The reversal of 20104401025100 is 152010440102.

It is a happy number.

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 47 ways as a sum of consecutive naturals, for example, 65218532 + ... + 65526068.

Almost surely, 2^{20104401025100} is an apocalyptic number.

20104401025100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20104401025100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25472767305216).

20104401025100 is an abundant number, since it is smaller than the sum of its proper divisors (30841133585332).

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

20104401025100 is a wasteful number, since it uses less digits than its factorization.

20104401025100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309592 (or 309585 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 20104401025100 its reverse (152010440102), we get a palindrome (20256411465202).

The spelling of 20104401025100 in words is "twenty trillion, one hundred four billion, four hundred one million, twenty-five thousand, one hundred".