191920010019 has 16 divisors (see below), whose sum is σ = 259432601760. Its totient is φ = 126186905600.

The previous prime is 191920009997. The next prime is 191920010047. The reversal of 191920010019 is 910010029191.

It is a cyclic number.

It is not a de Polignac number, because 191920010019 - 2¹³ = 191920001827 is a prime.

It is a super-2 number, since 2×191920010019² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191920010089) 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, 1154424 + ... + 1310165.

It is an arithmetic number, because the mean of its divisors is an integer number (16214537610).

Almost surely, 2^191920010019 is an apocalyptic number.

191920010019 is a deficient number, since it is larger than the sum of its proper divisors (67512591741).

191920010019 is a wasteful number, since it uses less digits than its factorization.

191920010019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464950.

The product of its (nonzero) digits is 1458, while the sum is 33.

The spelling of 191920010019 in words is "one hundred ninety-one billion, nine hundred twenty million, ten thousand, nineteen".