21985365883041 has 20 divisors (see below), whose sum is σ = 35828003662704. Its totient is φ = 13324464171000.

The previous prime is 21985365882959. The next prime is 21985365883069. The reversal of 21985365883041 is 14038856358912.

21985365883041 is a `hidden beast` number, since 2 + 1 + 9 + 8 + 5 + 3 + 6 + 588 + 3 + 0 + 41 = 666.

It is not a de Polignac number, because 21985365883041 - 2²² = 21985361688737 is a prime.

It is a super-2 number, since 2×21985365883041² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21985365883041.

It is not an unprimeable number, because it can be changed into a prime (21985365883241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12337465935 + ... + 12337467716.

Almost surely, 2^{21985365883041} is an apocalyptic number.

It is an amenable number.

21985365883041 is a deficient number, since it is larger than the sum of its proper divisors (13842637779663).

21985365883041 is a wasteful number, since it uses less digits than its factorization.

21985365883041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24674933674 (or 24674933665 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 63.

The spelling of 21985365883041 in words is "twenty-one trillion, nine hundred eighty-five billion, three hundred sixty-five million, eight hundred eighty-three thousand, forty-one".