21136072726 has 8 divisors (see below), whose sum is σ = 32797354320. Its totient is φ = 10203621288.

The previous prime is 21136072723. The next prime is 21136072751. The reversal of 21136072726 is 62727063112.

It is a happy number.

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

It is a super-2 number, since 2×21136072726² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21136072723) 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, 182207466 + ... + 182207581.

It is an arithmetic number, because the mean of its divisors is an integer number (4099669290).

Almost surely, 2^21136072726 is an apocalyptic number.

21136072726 is a deficient number, since it is larger than the sum of its proper divisors (11661281594).

21136072726 is a wasteful number, since it uses less digits than its factorization.

21136072726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364415078.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 21136072726 in words is "twenty-one billion, one hundred thirty-six million, seventy-two thousand, seven hundred twenty-six".