20527144919 has 2 divisors, whose sum is σ = 20527144920. Its totient is φ = 20527144918.

The previous prime is 20527144843. The next prime is 20527144927. The reversal of 20527144919 is 91944172502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20527144919 is a prime.

It is a super-2 number, since 2×20527144919² (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 20527144919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20527144219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10263572459 + 10263572460.

It is an arithmetic number, because the mean of its divisors is an integer number (10263572460).

Almost surely, 2^20527144919 is an apocalyptic number.

20527144919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20527144919 is an equidigital number, since it uses as much as digits as its factorization.

20527144919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 20527144919 in words is "twenty billion, five hundred twenty-seven million, one hundred forty-four thousand, nine hundred nineteen".