91100030020 has 48 divisors (see below), whose sum is σ = 191882009088. Its totient is φ = 36331182720.

The previous prime is 91100030011. The next prime is 91100030029. The reversal of 91100030020 is 2003000119.

It is an interprime number because it is at equal distance from previous prime (91100030011) and next prime (91100030029).

It is a junction number, because it is equal to n+sod(n) for n = 91100029976 and 91100030003.

It is not an unprimeable number, because it can be changed into a prime (91100030029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24441397 + ... + 24445123.

It is an arithmetic number, because the mean of its divisors is an integer number (3997541856).

Almost surely, 2^91100030020 is an apocalyptic number.

It is an amenable number.

91100030020 is an abundant number, since it is smaller than the sum of its proper divisors (100781979068).

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

91100030020 is a wasteful number, since it uses less digits than its factorization.

91100030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7060 (or 7058 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 91100030020 its reverse (2003000119), we get a palindrome (93103030139).

The spelling of 91100030020 in words is "ninety-one billion, one hundred million, thirty thousand, twenty".