91092020 has 24 divisors (see below), whose sum is σ = 192804864. Its totient is φ = 36148896.

The previous prime is 91092007. The next prime is 91092073. The reversal of 91092020 is 2029019.

It is a super-2 number, since 2×91092020² = 16595512215360800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15392 + ... + 20471.

It is an arithmetic number, because the mean of its divisors is an integer number (8033536).

Almost surely, 2^91092020 is an apocalyptic number.

It is an amenable number.

91092020 is an abundant number, since it is smaller than the sum of its proper divisors (101712844).

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

91092020 is a wasteful number, since it uses less digits than its factorization.

91092020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35999 (or 35997 counting only the distinct ones).

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

The square root of 91092020 is about 9544.2139540142. The cubic root of 91092020 is about 449.9457053835.

The spelling of 91092020 in words is "ninety-one million, ninety-two thousand, twenty".