20200909100 has 72 divisors (see below), whose sum is σ = 45073323456. Its totient is φ = 7853760000.

The previous prime is 20200909081. The next prime is 20200909109. The reversal of 20200909100 is 190900202.

It is not an unprimeable number, because it can be changed into a prime (20200909109) 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, 1102010 + ... + 1120190.

Almost surely, 2^20200909100 is an apocalyptic number.

20200909100 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 20200909100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22536661728).

20200909100 is an abundant number, since it is smaller than the sum of its proper divisors (24872414356).

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

20200909100 is a wasteful number, since it uses less digits than its factorization.

20200909100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18507 (or 18500 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 20200909100 in words is "twenty billion, two hundred million, nine hundred nine thousand, one hundred".