21506734460104 has 16 divisors (see below), whose sum is σ = 40339838984220. Its totient is φ = 10749444064320.

The previous prime is 21506734460083. The next prime is 21506734460117. The reversal of 21506734460104 is 40106443760512.

It can be written as a sum of positive squares in 2 ways, for example, as 21204201459204 + 302533000900 = 4604802^2 + 550030^2 .

It is a super-3 number, since 3×21506734460104³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490372419 + ... + 490416274.

Almost surely, 2^{21506734460104} is an apocalyptic number.

It is an amenable number.

21506734460104 is a deficient number, since it is larger than the sum of its proper divisors (18833104524116).

21506734460104 is a wasteful number, since it uses less digits than its factorization.

21506734460104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980791440 (or 980791436 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 21506734460104 in words is "twenty-one trillion, five hundred six billion, seven hundred thirty-four million, four hundred sixty thousand, one hundred four".