190920020091 has 16 divisors (see below), whose sum is σ = 261466899744. Its totient is φ = 123827284224.

The previous prime is 190920020069. The next prime is 190920020099. The reversal of 190920020091 is 190020029091.

It is not a de Polignac number, because 190920020091 - 2¹¹ = 190920018043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190920020099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1063735 + ... + 1230191.

It is an arithmetic number, because the mean of its divisors is an integer number (16341681234).

Almost surely, 2^190920020091 is an apocalyptic number.

190920020091 is a deficient number, since it is larger than the sum of its proper divisors (70546879653).

190920020091 is a wasteful number, since it uses less digits than its factorization.

190920020091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176830.

The product of its (nonzero) digits is 2916, while the sum is 33.

It can be divided in two parts, 1909200 and 20091, that added together give a palindrome (1929291).

The spelling of 190920020091 in words is "one hundred ninety billion, nine hundred twenty million, twenty thousand, ninety-one".