19341986357 has 2 divisors, whose sum is σ = 19341986358. Its totient is φ = 19341986356.

The previous prime is 19341986329. The next prime is 19341986369. The reversal of 19341986357 is 75368914391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17946889156 + 1395097201 = 133966^2 + 37351^2 .

It is a cyclic number.

It is not a de Polignac number, because 19341986357 - 2²⁶ = 19274877493 is a prime.

It is a super-2 number, since 2×19341986357² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19341986327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9670993178 + 9670993179.

It is an arithmetic number, because the mean of its divisors is an integer number (9670993179).

Almost surely, 2^19341986357 is an apocalyptic number.

It is an amenable number.

19341986357 is a deficient number, since it is larger than the sum of its proper divisors (1).

19341986357 is an equidigital number, since it uses as much as digits as its factorization.

19341986357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 56.

The spelling of 19341986357 in words is "nineteen billion, three hundred forty-one million, nine hundred eighty-six thousand, three hundred fifty-seven".