20111445100 has 18 divisors (see below), whose sum is σ = 43641836084. Its totient is φ = 8044578000.

The previous prime is 20111445047. The next prime is 20111445149. The reversal of 20111445100 is 154411102.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100557126 + ... + 100557325.

Almost surely, 2^20111445100 is an apocalyptic number.

20111445100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111445100 is an abundant number, since it is smaller than the sum of its proper divisors (23530390984).

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

20111445100 is a wasteful number, since it uses less digits than its factorization.

20111445100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201114465 (or 201114458 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 20111445100 its reverse (154411102), we get a palindrome (20265856202).

The spelling of 20111445100 in words is "twenty billion, one hundred eleven million, four hundred forty-five thousand, one hundred".