20145827519 has 2 divisors, whose sum is σ = 20145827520. Its totient is φ = 20145827518.

The previous prime is 20145827497. The next prime is 20145827551. The reversal of 20145827519 is 91572854102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20145827519 - 2²⁸ = 19877392063 is a prime.

It is a super-2 number, since 2×20145827519² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20145827519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20145827419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072913759 + 10072913760.

It is an arithmetic number, because the mean of its divisors is an integer number (10072913760).

Almost surely, 2^20145827519 is an apocalyptic number.

20145827519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20145827519 is an equidigital number, since it uses as much as digits as its factorization.

20145827519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 44.

The spelling of 20145827519 in words is "twenty billion, one hundred forty-five million, eight hundred twenty-seven thousand, five hundred nineteen".