19876025513 has 2 divisors, whose sum is σ = 19876025514. Its totient is φ = 19876025512.

The previous prime is 19876025479. The next prime is 19876025531. The reversal of 19876025513 is 31552067891.

Together with next prime (19876025531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18580961344 + 1295064169 = 136312^2 + 35987^2 .

It is a cyclic number.

It is not a de Polignac number, because 19876025513 - 2¹⁴ = 19876009129 is a prime.

It is not a weakly prime, because it can be changed into another prime (19876025563) 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, 9938012756 + 9938012757.

It is an arithmetic number, because the mean of its divisors is an integer number (9938012757).

Almost surely, 2^19876025513 is an apocalyptic number.

It is an amenable number.

19876025513 is a deficient number, since it is larger than the sum of its proper divisors (1).

19876025513 is an equidigital number, since it uses as much as digits as its factorization.

19876025513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 19876025513 in words is "nineteen billion, eight hundred seventy-six million, twenty-five thousand, five hundred thirteen".