19934691 has 16 divisors (see below), whose sum is σ = 30745344. Its totient is φ = 11253024.

The previous prime is 19934689. The next prime is 19934713. The reversal of 19934691 is 19643991.

It is not a de Polignac number, because 19934691 - 2¹ = 19934689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19934641) 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, 3976 + ... + 7461.

It is an arithmetic number, because the mean of its divisors is an integer number (1921584).

Almost surely, 2^19934691 is an apocalyptic number.

19934691 is a deficient number, since it is larger than the sum of its proper divisors (10810653).

19934691 is a wasteful number, since it uses less digits than its factorization.

19934691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11530.

The product of its digits is 52488, while the sum is 42.

The square root of 19934691 is about 4464.8282161803. The cubic root of 19934691 is about 271.1459796381.

The spelling of 19934691 in words is "nineteen million, nine hundred thirty-four thousand, six hundred ninety-one".