21440033356458 has 8 divisors (see below), whose sum is σ = 42880066712928. Its totient is φ = 7146677785484.

The previous prime is 21440033356457. The next prime is 21440033356459. The reversal of 21440033356458 is 85465333004412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21440033356457) and next prime (21440033356459).

It is a sphenic number, since it is the product of 3 distinct primes.

21440033356458 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21440033356453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1786669446366 + ... + 1786669446377.

It is an arithmetic number, because the mean of its divisors is an integer number (5360008339116).

Almost surely, 2^{21440033356458} is an apocalyptic number.

21440033356458 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21440033356458 is a wasteful number, since it uses less digits than its factorization.

21440033356458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573338892748.

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 21440033356458 in words is "twenty-one trillion, four hundred forty billion, thirty-three million, three hundred fifty-six thousand, four hundred fifty-eight".