20454205120100 has 72 divisors (see below), whose sum is σ = 44712163217568. Its totient is φ = 8121497529600.

The previous prime is 20454205120081. The next prime is 20454205120199. The reversal of 20454205120100 is 102150245402.

It is a self number, because there is not a number n which added to its sum of digits gives 20454205120100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 336592319 + ... + 336653081.

Almost surely, 2^{20454205120100} is an apocalyptic number.

20454205120100 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 20454205120100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22356081608784).

20454205120100 is an abundant number, since it is smaller than the sum of its proper divisors (24257958097468).

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

20454205120100 is a wasteful number, since it uses less digits than its factorization.

20454205120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85485 (or 85478 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 20454205120100 its reverse (102150245402), we get a palindrome (20556355365502).

The spelling of 20454205120100 in words is "twenty trillion, four hundred fifty-four billion, two hundred five million, one hundred twenty thousand, one hundred".