19874269451 has 2 divisors, whose sum is σ = 19874269452. Its totient is φ = 19874269450.

The previous prime is 19874269427. The next prime is 19874269489. The reversal of 19874269451 is 15496247891.

It is a weak prime.

It is an emirp because it is prime and its reverse (15496247891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19874269451 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (19874269411) 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, 9937134725 + 9937134726.

It is an arithmetic number, because the mean of its divisors is an integer number (9937134726).

Almost surely, 2^19874269451 is an apocalyptic number.

19874269451 is a deficient number, since it is larger than the sum of its proper divisors (1).

19874269451 is an equidigital number, since it uses as much as digits as its factorization.

19874269451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 56.

The spelling of 19874269451 in words is "nineteen billion, eight hundred seventy-four million, two hundred sixty-nine thousand, four hundred fifty-one".