21800586136 has 64 divisors (see below), whose sum is σ = 47041689600. Its totient is φ = 9278032128.

The previous prime is 21800586113. The next prime is 21800586151. The reversal of 21800586136 is 63168500812.

It is a congruent number.

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, 11957721 + ... + 11959543.

It is an arithmetic number, because the mean of its divisors is an integer number (735026400).

Almost surely, 2^21800586136 is an apocalyptic number.

It is an amenable number.

21800586136 is an abundant number, since it is smaller than the sum of its proper divisors (25241103464).

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

21800586136 is a wasteful number, since it uses less digits than its factorization.

21800586136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208 (or 3204 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 21800586136 in words is "twenty-one billion, eight hundred million, five hundred eighty-six thousand, one hundred thirty-six".