920190929091 has 32 divisors (see below), whose sum is σ = 1422142460928. Its totient is φ = 518345412480.

The previous prime is 920190929083. The next prime is 920190929117. The reversal of 920190929091 is 190929091029.

It is not a de Polignac number, because 920190929091 - 2³ = 920190929083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (920190929011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11789205 + ... + 11867001.

It is an arithmetic number, because the mean of its divisors is an integer number (44441951904).

Almost surely, 2^920190929091 is an apocalyptic number.

920190929091 is a deficient number, since it is larger than the sum of its proper divisors (501951531837).

920190929091 is a wasteful number, since it uses less digits than its factorization.

920190929091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85811.

The product of its (nonzero) digits is 236196, while the sum is 51.

The spelling of 920190929091 in words is "nine hundred twenty billion, one hundred ninety million, nine hundred twenty-nine thousand, ninety-one".