19642113 has 12 divisors (see below), whose sum is σ = 28554708. Its totient is φ = 13010400.

The previous prime is 19642093. The next prime is 19642141. The reversal of 19642113 is 31124691.

19642113 is a `hidden beast` number, since 1 + 9 + 642 + 1 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11068929 + 8573184 = 3327^2 + 2928^2 .

It is not a de Polignac number, because 19642113 - 2⁵ = 19642081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19642613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5538 + ... + 8363.

It is an arithmetic number, because the mean of its divisors is an integer number (2379559).

Almost surely, 2^19642113 is an apocalyptic number.

It is an amenable number.

19642113 is a deficient number, since it is larger than the sum of its proper divisors (8912595).

19642113 is a wasteful number, since it uses less digits than its factorization.

19642113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14064 (or 14061 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 19642113 is about 4431.9423507081. The cubic root of 19642113 is about 269.8129156658.

The spelling of 19642113 in words is "nineteen million, six hundred forty-two thousand, one hundred thirteen".