21473144650673 has 16 divisors (see below), whose sum is σ = 22186144619520. Its totient is φ = 20767295548800.

The previous prime is 21473144650619. The next prime is 21473144650679. The reversal of 21473144650673 is 37605644137412.

It is a cyclic number.

It is not a de Polignac number, because 21473144650673 - 2²⁶ = 21473077541809 is a prime.

It is a super-2 number, since 2×21473144650673² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21473144650679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7946693 + ... + 10300301.

It is an arithmetic number, because the mean of its divisors is an integer number (1386634038720).

Almost surely, 2^{21473144650673} is an apocalyptic number.

It is an amenable number.

21473144650673 is a deficient number, since it is larger than the sum of its proper divisors (712999968847).

21473144650673 is a wasteful number, since it uses less digits than its factorization.

21473144650673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355128.

The product of its (nonzero) digits is 10160640, while the sum is 53.

The spelling of 21473144650673 in words is "twenty-one trillion, four hundred seventy-three billion, one hundred forty-four million, six hundred fifty thousand, six hundred seventy-three".