21236072726 has 8 divisors (see below), whose sum is σ = 34749937224. Its totient is φ = 9652760320.

The previous prime is 21236072723. The next prime is 21236072729. The reversal of 21236072726 is 62727063212.

It is an interprime number because it is at equal distance from previous prime (21236072723) and next prime (21236072729).

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

It is a super-2 number, since 2×21236072726² (a number of 21 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 21236072726.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21236072723) 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, 482637995 + ... + 482638038.

It is an arithmetic number, because the mean of its divisors is an integer number (4343742153).

Almost surely, 2^21236072726 is an apocalyptic number.

21236072726 is a deficient number, since it is larger than the sum of its proper divisors (13513864498).

21236072726 is a wasteful number, since it uses less digits than its factorization.

21236072726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965276046.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 21236072726 in words is "twenty-one billion, two hundred thirty-six million, seventy-two thousand, seven hundred twenty-six".