21819783636036 has 96 divisors (see below), whose sum is σ = 56616516190080. Its totient is φ = 7267258196352.

The previous prime is 21819783635981. The next prime is 21819783636097. The reversal of 21819783636036 is 63063638791812.

21819783636036 is a `hidden beast` number, since 2 + 1 + 8 + 19 + 7 + 8 + 3 + 6 + 3 + 603 + 6 = 666.

It is a super-2 number, since 2×21819783636036² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 957542635 + ... + 957565421.

It is an arithmetic number, because the mean of its divisors is an integer number (589755376980).

Almost surely, 2^{21819783636036} is an apocalyptic number.

It is an amenable number.

21819783636036 is an abundant number, since it is smaller than the sum of its proper divisors (34796732554044).

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

21819783636036 is a wasteful number, since it uses less digits than its factorization.

21819783636036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29730 (or 29722 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 21819783636036 in words is "twenty-one trillion, eight hundred nineteen billion, seven hundred eighty-three million, six hundred thirty-six thousand, thirty-six".