19935902743 has 2 divisors, whose sum is σ = 19935902744. Its totient is φ = 19935902742.

The previous prime is 19935902699. The next prime is 19935902759. The reversal of 19935902743 is 34720953991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19935902743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19935902783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9967951371 + 9967951372.

It is an arithmetic number, because the mean of its divisors is an integer number (9967951372).

Almost surely, 2^19935902743 is an apocalyptic number.

19935902743 is a deficient number, since it is larger than the sum of its proper divisors (1).

19935902743 is an equidigital number, since it uses as much as digits as its factorization.

19935902743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1837080, while the sum is 52.

The spelling of 19935902743 in words is "nineteen billion, nine hundred thirty-five million, nine hundred two thousand, seven hundred forty-three".