19374652987 has 2 divisors, whose sum is σ = 19374652988. Its totient is φ = 19374652986.

The previous prime is 19374652967. The next prime is 19374652993. The reversal of 19374652987 is 78925647391.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19374652987 is a prime.

It is not a weakly prime, because it can be changed into another prime (19374652967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9687326493 + 9687326494.

It is an arithmetic number, because the mean of its divisors is an integer number (9687326494).

Almost surely, 2^19374652987 is an apocalyptic number.

19374652987 is a deficient number, since it is larger than the sum of its proper divisors (1).

19374652987 is an equidigital number, since it uses as much as digits as its factorization.

19374652987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 61.

The spelling of 19374652987 in words is "nineteen billion, three hundred seventy-four million, six hundred fifty-two thousand, nine hundred eighty-seven".