21473454023634 has 32 divisors (see below), whose sum is σ = 43025072517504. Its totient is φ = 7144796395520.

The previous prime is 21473454023617. The next prime is 21473454023639. The reversal of 21473454023634 is 43632045437412.

It is a super-2 number, since 2×21473454023634² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21473454023639) 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, 14134432 + ... + 15579764.

It is an arithmetic number, because the mean of its divisors is an integer number (1344533516172).

Almost surely, 2^{21473454023634} is an apocalyptic number.

21473454023634 is an abundant number, since it is smaller than the sum of its proper divisors (21551618493870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21473454023634 is a wasteful number, since it uses less digits than its factorization.

21473454023634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449842.

The product of its (nonzero) digits is 5806080, while the sum is 48.

The spelling of 21473454023634 in words is "twenty-one trillion, four hundred seventy-three billion, four hundred fifty-four million, twenty-three thousand, six hundred thirty-four".