20145426319 has 2 divisors, whose sum is σ = 20145426320. Its totient is φ = 20145426318.

The previous prime is 20145426313. The next prime is 20145426337. The reversal of 20145426319 is 91362454102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20145426319 - 2³ = 20145426311 is a prime.

It is a super-2 number, since 2×20145426319² (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 (20145426311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072713159 + 10072713160.

It is an arithmetic number, because the mean of its divisors is an integer number (10072713160).

Almost surely, 2^20145426319 is an apocalyptic number.

20145426319 is a deficient number, since it is larger than the sum of its proper divisors (1).

20145426319 is an equidigital number, since it uses as much as digits as its factorization.

20145426319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 20145426319 in words is "twenty billion, one hundred forty-five million, four hundred twenty-six thousand, three hundred nineteen".