20523013019 has 2 divisors, whose sum is σ = 20523013020. Its totient is φ = 20523013018.

The previous prime is 20523012967. The next prime is 20523013031. The reversal of 20523013019 is 91031032502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20523013019 is a prime.

It is a super-2 number, since 2×20523013019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20523013099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261506509 + 10261506510.

It is an arithmetic number, because the mean of its divisors is an integer number (10261506510).

Almost surely, 2^20523013019 is an apocalyptic number.

20523013019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523013019 is an equidigital number, since it uses as much as digits as its factorization.

20523013019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The spelling of 20523013019 in words is "twenty billion, five hundred twenty-three million, thirteen thousand, nineteen".