26136001820 has 24 divisors (see below), whose sum is σ = 55164219264. Its totient is φ = 10401331136.

The previous prime is 26136001813. The next prime is 26136001849. The reversal of 26136001820 is 2810063162.

It is a super-2 number, since 2×26136001820² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3312812 + ... + 3320691.

It is an arithmetic number, because the mean of its divisors is an integer number (2298509136).

Almost surely, 2^26136001820 is an apocalyptic number.

26136001820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26136001820 is an abundant number, since it is smaller than the sum of its proper divisors (29028217444).

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

26136001820 is a wasteful number, since it uses less digits than its factorization.

26136001820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6633709 (or 6633707 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 26136001820 its reverse (2810063162), we get a palindrome (28946064982).

The spelling of 26136001820 in words is "twenty-six billion, one hundred thirty-six million, one thousand, eight hundred twenty".