19867997107 has 4 divisors (see below), whose sum is σ = 22706282416. Its totient is φ = 17029711800.

The previous prime is 19867997101. The next prime is 19867997111. The reversal of 19867997107 is 70179976891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19867997107 - 2¹⁵ = 19867964339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19867997101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1419142644 + ... + 1419142657.

It is an arithmetic number, because the mean of its divisors is an integer number (5676570604).

Almost surely, 2^19867997107 is an apocalyptic number.

19867997107 is a deficient number, since it is larger than the sum of its proper divisors (2838285309).

19867997107 is an equidigital number, since it uses as much as digits as its factorization.

19867997107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838285308.

The product of its (nonzero) digits is 12002256, while the sum is 64.

The spelling of 19867997107 in words is "nineteen billion, eight hundred sixty-seven million, nine hundred ninety-seven thousand, one hundred seven".