20019851167 has 2 divisors, whose sum is σ = 20019851168. Its totient is φ = 20019851166.

The previous prime is 20019851077. The next prime is 20019851233. The reversal of 20019851167 is 76115891002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20019851167 - 2³¹ = 17872367519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20019851867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10009925583 + 10009925584.

It is an arithmetic number, because the mean of its divisors is an integer number (10009925584).

Almost surely, 2^20019851167 is an apocalyptic number.

20019851167 is a deficient number, since it is larger than the sum of its proper divisors (1).

20019851167 is an equidigital number, since it uses as much as digits as its factorization.

20019851167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 20019851167 in words is "twenty billion, nineteen million, eight hundred fifty-one thousand, one hundred sixty-seven".