20111092900 has 36 divisors (see below), whose sum is σ = 43648495380. Its totient is φ = 8043068800.

The previous prime is 20111092877. The next prime is 20111092907. The reversal of 20111092900 is 929011102.

It can be written as a sum of positive squares in 6 ways, for example, as 19731364 + 20091361536 = 4442^2 + 141744^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20111092907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 740766 + ... + 767434.

It is an arithmetic number, because the mean of its divisors is an integer number (1212458205).

Almost surely, 2^20111092900 is an apocalyptic number.

20111092900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111092900 is an abundant number, since it is smaller than the sum of its proper divisors (23537402480).

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

20111092900 is a wasteful number, since it uses less digits than its factorization.

20111092900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34224 (or 34217 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 20111092900 in words is "twenty billion, one hundred eleven million, ninety-two thousand, nine hundred".