19935131 has 2 divisors, whose sum is σ = 19935132. Its totient is φ = 19935130.

The previous prime is 19935127. The next prime is 19935133. The reversal of 19935131 is 13153991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19935131 - 2² = 19935127 is a prime.

It is a super-2 number, since 2×19935131² = 794818895974322, which contains 22 as substring.

Together with 19935133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19935133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9967565 + 9967566.

It is an arithmetic number, because the mean of its divisors is an integer number (9967566).

Almost surely, 2^19935131 is an apocalyptic number.

19935131 is a deficient number, since it is larger than the sum of its proper divisors (1).

19935131 is an equidigital number, since it uses as much as digits as its factorization.

19935131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3645, while the sum is 32.

The square root of 19935131 is about 4464.8774899206. The cubic root of 19935131 is about 271.1479745416.

The spelling of 19935131 in words is "nineteen million, nine hundred thirty-five thousand, one hundred thirty-one".