21462185919745 has 8 divisors (see below), whose sum is σ = 25942613054184. Its totient is φ = 17044422102144.

The previous prime is 21462185919721. The next prime is 21462185919893. The reversal of 21462185919745 is 54791958126412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7860554254224 + 13601631665521 = 2803668^2 + 3688039^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21462185919745 is a prime.

It is a Duffinian 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, 15665828454 + ... + 15665829823.

It is an arithmetic number, because the mean of its divisors is an integer number (3242826631773).

Almost surely, 2^{21462185919745} is an apocalyptic number.

It is an amenable number.

21462185919745 is a deficient number, since it is larger than the sum of its proper divisors (4480427134439).

21462185919745 is a wasteful number, since it uses less digits than its factorization.

21462185919745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31331658419.

The product of its digits is 43545600, while the sum is 64.

The spelling of 21462185919745 in words is "twenty-one trillion, four hundred sixty-two billion, one hundred eighty-five million, nine hundred nineteen thousand, seven hundred forty-five".