20513108527 has 2 divisors, whose sum is σ = 20513108528. Its totient is φ = 20513108526.

The previous prime is 20513108519. The next prime is 20513108597. The reversal of 20513108527 is 72580131502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20513108527 - 2³ = 20513108519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20513108492 and 20513108501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20513108507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256554263 + 10256554264.

It is an arithmetic number, because the mean of its divisors is an integer number (10256554264).

Almost surely, 2^20513108527 is an apocalyptic number.

20513108527 is a deficient number, since it is larger than the sum of its proper divisors (1).

20513108527 is an equidigital number, since it uses as much as digits as its factorization.

20513108527 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 34.

The spelling of 20513108527 in words is "twenty billion, five hundred thirteen million, one hundred eight thousand, five hundred twenty-seven".