4420040023981 has 2 divisors, whose sum is σ = 4420040023982. Its totient is φ = 4420040023980.

The previous prime is 4420040023979. The next prime is 4420040024033. The reversal of 4420040023981 is 1893200400244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3976470703881 + 443569320100 = 1994109^2 + 666010^2 .

It is a cyclic number.

It is not a de Polignac number, because 4420040023981 - 2¹ = 4420040023979 is a prime.

It is a super-2 number, since 2×4420040023981² (a number of 26 digits) contains 22 as substring.

Together with 4420040023979, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4420040023981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4420040023901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2210020011990 + 2210020011991.

It is an arithmetic number, because the mean of its divisors is an integer number (2210020011991).

Almost surely, 2^{4420040023981} is an apocalyptic number.

It is an amenable number.

4420040023981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4420040023981 is an equidigital number, since it uses as much as digits as its factorization.

4420040023981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 4420040023981 in words is "four trillion, four hundred twenty billion, forty million, twenty-three thousand, nine hundred eighty-one".