19934091 has 12 divisors (see below), whose sum is σ = 28845960. Its totient is φ = 13265280.

The previous prime is 19934071. The next prime is 19934093. The reversal of 19934091 is 19043991.

It is not a de Polignac number, because 19934091 - 2¹⁷ = 19803019 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (19934093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4251 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (2403830).

Almost surely, 2^19934091 is an apocalyptic number.

19934091 is a deficient number, since it is larger than the sum of its proper divisors (8911869).

19934091 is a wasteful number, since it uses less digits than its factorization.

19934091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026 (or 4023 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 19934091 is about 4464.7610238399. The cubic root of 19934091 is about 271.1432592679.

It can be divided in two parts, 1993 and 4091, that added together give a square (6084 = 78²).

The spelling of 19934091 in words is "nineteen million, nine hundred thirty-four thousand, ninety-one".