21392755746 has 16 divisors (see below), whose sum is σ = 42871260000. Its totient is φ = 7116627168.

The previous prime is 21392755711. The next prime is 21392755751. The reversal of 21392755746 is 64755729312.

21392755746 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3569611 + ... + 3575598.

It is an arithmetic number, because the mean of its divisors is an integer number (2679453750).

Almost surely, 2^21392755746 is an apocalyptic number.

21392755746 is an abundant number, since it is smaller than the sum of its proper divisors (21478504254).

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

21392755746 is a wasteful number, since it uses less digits than its factorization.

21392755746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7145713.

The product of its digits is 3175200, while the sum is 51.

The spelling of 21392755746 in words is "twenty-one billion, three hundred ninety-two million, seven hundred fifty-five thousand, seven hundred forty-six".