191020001010 has 32 divisors (see below), whose sum is σ = 470838491712. Its totient is φ = 49561945920.

The previous prime is 191020000987. The next prime is 191020001041. The reversal of 191020001010 is 10100020191.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86043936 + ... + 86046155.

It is an arithmetic number, because the mean of its divisors is an integer number (14713702866).

Almost surely, 2^191020001010 is an apocalyptic number.

191020001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191020001010 is an abundant number, since it is smaller than the sum of its proper divisors (279818490702).

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

191020001010 is a wasteful number, since it uses less digits than its factorization.

191020001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172090138.

The product of its (nonzero) digits is 18, while the sum is 15.

The spelling of 191020001010 in words is "one hundred ninety-one billion, twenty million, one thousand, ten".