21214554413983 has 4 divisors (see below), whose sum is σ = 24245205044560. Its totient is φ = 18183903783408.

The previous prime is 21214554413957. The next prime is 21214554414013. The reversal of 21214554413983 is 38931445541212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21214554413983 - 2²¹ = 21214552316831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21214554413983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214554413903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515325315278 + ... + 1515325315291.

It is an arithmetic number, because the mean of its divisors is an integer number (6061301261140).

Almost surely, 2^{21214554413983} is an apocalyptic number.

21214554413983 is a deficient number, since it is larger than the sum of its proper divisors (3030650630577).

21214554413983 is an equidigital number, since it uses as much as digits as its factorization.

21214554413983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030650630576.

The product of its digits is 4147200, while the sum is 52.

The spelling of 21214554413983 in words is "twenty-one trillion, two hundred fourteen billion, five hundred fifty-four million, four hundred thirteen thousand, nine hundred eighty-three".