26563510020 has 48 divisors (see below), whose sum is σ = 76777118208. Its totient is φ = 6855098880.

The previous prime is 26563510003. The next prime is 26563510067. The reversal of 26563510020 is 2001536562.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 26563510020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7138869 + ... + 7142588.

It is an arithmetic number, because the mean of its divisors is an integer number (1599523296).

Almost surely, 2^26563510020 is an apocalyptic number.

26563510020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26563510020 is an abundant number, since it is smaller than the sum of its proper divisors (50213608188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26563510020 is a wasteful number, since it uses less digits than its factorization.

26563510020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14281500 (or 14281498 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 26563510020 in words is "twenty-six billion, five hundred sixty-three million, five hundred ten thousand, twenty".