21446265061 has 16 divisors (see below), whose sum is σ = 24176283264. Its totient is φ = 18876014784.

The previous prime is 21446265053. The next prime is 21446265073. The reversal of 21446265061 is 16056264412.

It is a cyclic number.

It is not a de Polignac number, because 21446265061 - 2³ = 21446265053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21446265061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446265661) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18351 + ... + 207916.

It is an arithmetic number, because the mean of its divisors is an integer number (1511017704).

Almost surely, 2^21446265061 is an apocalyptic number.

It is an amenable number.

21446265061 is a deficient number, since it is larger than the sum of its proper divisors (2730018203).

21446265061 is a wasteful number, since it uses less digits than its factorization.

21446265061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226620.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 21446265061 in words is "twenty-one billion, four hundred forty-six million, two hundred sixty-five thousand, sixty-one".