21481582810726 has 8 divisors (see below), whose sum is σ = 34117807993560. Its totient is φ = 10108980146208.

The previous prime is 21481582810577. The next prime is 21481582810729. The reversal of 21481582810726 is 62701828518412.

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

It is a super-2 number, since 2×21481582810726² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21481582810729) 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, 315905629536 + ... + 315905629603.

It is an arithmetic number, because the mean of its divisors is an integer number (4264725999195).

Almost surely, 2^{21481582810726} is an apocalyptic number.

21481582810726 is a deficient number, since it is larger than the sum of its proper divisors (12636225182834).

21481582810726 is a wasteful number, since it uses less digits than its factorization.

21481582810726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631811259158.

The product of its (nonzero) digits is 3440640, while the sum is 55.

The spelling of 21481582810726 in words is "twenty-one trillion, four hundred eighty-one billion, five hundred eighty-two million, eight hundred ten thousand, seven hundred twenty-six".