19692419837 has 2 divisors, whose sum is σ = 19692419838. Its totient is φ = 19692419836.

The previous prime is 19692419827. The next prime is 19692419839. The reversal of 19692419837 is 73891429691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13752018361 + 5940401476 = 117269^2 + 77074^2 .

It is a cyclic number.

It is not a de Polignac number, because 19692419837 - 2²⁰ = 19691371261 is a prime.

It is a super-2 number, since 2×19692419837² (a number of 21 digits) contains 22 as substring.

Together with 19692419839, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19692419839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9846209918 + 9846209919.

It is an arithmetic number, because the mean of its divisors is an integer number (9846209919).

Almost surely, 2^19692419837 is an apocalyptic number.

It is an amenable number.

19692419837 is a deficient number, since it is larger than the sum of its proper divisors (1).

19692419837 is an equidigital number, since it uses as much as digits as its factorization.

19692419837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The spelling of 19692419837 in words is "nineteen billion, six hundred ninety-two million, four hundred nineteen thousand, eight hundred thirty-seven".