21120740726 has 16 divisors (see below), whose sum is σ = 32310283104. Its totient is φ = 10351034304.

The previous prime is 21120740717. The next prime is 21120740783. The reversal of 21120740726 is 62704702112.

It is a junction number, because it is equal to n+sod(n) for n = 21120740692 and 21120740701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13055 + ... + 205941.

It is an arithmetic number, because the mean of its divisors is an integer number (2019392694).

Almost surely, 2^21120740726 is an apocalyptic number.

21120740726 is a deficient number, since it is larger than the sum of its proper divisors (11189542378).

21120740726 is a wasteful number, since it uses less digits than its factorization.

21120740726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193975.

The product of its (nonzero) digits is 9408, while the sum is 32.

The spelling of 21120740726 in words is "twenty-one billion, one hundred twenty million, seven hundred forty thousand, seven hundred twenty-six".