13500420563 has 6 divisors (see below), whose sum is σ = 15704570916. Its totient is φ = 11571789012.

The previous prime is 13500420559. The next prime is 13500420581. The reversal of 13500420563 is 36502400531.

It is not a de Polignac number, because 13500420563 - 2² = 13500420559 is a prime.

It is a super-2 number, since 2×13500420563² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13500420523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137759345 + ... + 137759442.

It is an arithmetic number, because the mean of its divisors is an integer number (2617428486).

Almost surely, 2^13500420563 is an apocalyptic number.

13500420563 is a deficient number, since it is larger than the sum of its proper divisors (2204150353).

13500420563 is an equidigital number, since it uses as much as digits as its factorization.

13500420563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275518801 (or 275518794 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 13500420563 in words is "thirteen billion, five hundred million, four hundred twenty thousand, five hundred sixty-three".