21446270371 has 8 divisors (see below), whose sum is σ = 21560800464. Its totient is φ = 21332044800.

The previous prime is 21446270357. The next prime is 21446270429. The reversal of 21446270371 is 17307264412.

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-21446270371 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 21446270371.

It is not an unprimeable number, because it can be changed into a prime (21446270771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65800 + ... + 217306.

It is an arithmetic number, because the mean of its divisors is an integer number (2695100058).

Almost surely, 2^21446270371 is an apocalyptic number.

21446270371 is a deficient number, since it is larger than the sum of its proper divisors (114530093).

21446270371 is a wasteful number, since it uses less digits than its factorization.

21446270371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152261.

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 21446270371 in words is "twenty-one billion, four hundred forty-six million, two hundred seventy thousand, three hundred seventy-one".