20354916319 has 2 divisors, whose sum is σ = 20354916320. Its totient is φ = 20354916318.

The previous prime is 20354916299. The next prime is 20354916331. The reversal of 20354916319 is 91361945302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20354916319 - 2²¹ = 20352819167 is a prime.

It is a super-2 number, since 2×20354916319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20354916389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177458159 + 10177458160.

It is an arithmetic number, because the mean of its divisors is an integer number (10177458160).

Almost surely, 2^20354916319 is an apocalyptic number.

20354916319 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354916319 is an equidigital number, since it uses as much as digits as its factorization.

20354916319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 20354916319 in words is "twenty billion, three hundred fifty-four million, nine hundred sixteen thousand, three hundred nineteen".