19979522627 has 2 divisors, whose sum is σ = 19979522628. Its totient is φ = 19979522626.

The previous prime is 19979522611. The next prime is 19979522639. The reversal of 19979522627 is 72622597991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19979522627 - 2⁴ = 19979522611 is a prime.

It is a super-2 number, since 2×19979522627² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19979522027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9989761313 + 9989761314.

It is an arithmetic number, because the mean of its divisors is an integer number (9989761314).

Almost surely, 2^19979522627 is an apocalyptic number.

19979522627 is a deficient number, since it is larger than the sum of its proper divisors (1).

19979522627 is an equidigital number, since it uses as much as digits as its factorization.

19979522627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 59.

The spelling of 19979522627 in words is "nineteen billion, nine hundred seventy-nine million, five hundred twenty-two thousand, six hundred twenty-seven".