21472366740163 has 4 divisors (see below), whose sum is σ = 21500731822480. Its totient is φ = 21444001657848.

The previous prime is 21472366740161. The next prime is 21472366740203. The reversal of 21472366740163 is 36104766327412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21472366740163 - 2¹ = 21472366740161 is a prime.

It is a super-2 number, since 2×21472366740163² (a number of 27 digits) contains 22 as substring.

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 21472366740163.

It is not an unprimeable number, because it can be changed into a prime (21472366740161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14182540023 + ... + 14182541536.

It is an arithmetic number, because the mean of its divisors is an integer number (5375182955620).

Almost surely, 2^{21472366740163} is an apocalyptic number.

21472366740163 is a deficient number, since it is larger than the sum of its proper divisors (28365082317).

21472366740163 is an equidigital number, since it uses as much as digits as its factorization.

21472366740163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28365082316.

The product of its (nonzero) digits is 6096384, while the sum is 52.

The spelling of 21472366740163 in words is "twenty-one trillion, four hundred seventy-two billion, three hundred sixty-six million, seven hundred forty thousand, one hundred sixty-three".