19848096421 has 2 divisors, whose sum is σ = 19848096422. Its totient is φ = 19848096420.

The previous prime is 19848096403. The next prime is 19848096431. The reversal of 19848096421 is 12469084891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19114445025 + 733651396 = 138255^2 + 27086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19848096421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19848096431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9924048210 + 9924048211.

It is an arithmetic number, because the mean of its divisors is an integer number (9924048211).

Almost surely, 2^19848096421 is an apocalyptic number.

It is an amenable number.

19848096421 is a deficient number, since it is larger than the sum of its proper divisors (1).

19848096421 is an equidigital number, since it uses as much as digits as its factorization.

19848096421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 19848096421 in words is "nineteen billion, eight hundred forty-eight million, ninety-six thousand, four hundred twenty-one".