19676925479 has 2 divisors, whose sum is σ = 19676925480. Its totient is φ = 19676925478.

The previous prime is 19676925469. The next prime is 19676925497. The reversal of 19676925479 is 97452967691.

Together with next prime (19676925497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19676925479 - 2²⁰ = 19675876903 is a prime.

It is a super-2 number, since 2×19676925479² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19676925419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9838462739 + 9838462740.

It is an arithmetic number, because the mean of its divisors is an integer number (9838462740).

Almost surely, 2^19676925479 is an apocalyptic number.

19676925479 is a deficient number, since it is larger than the sum of its proper divisors (1).

19676925479 is an equidigital number, since it uses as much as digits as its factorization.

19676925479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51438240, while the sum is 65.

The spelling of 19676925479 in words is "nineteen billion, six hundred seventy-six million, nine hundred twenty-five thousand, four hundred seventy-nine".