21460477293 has 12 divisors (see below), whose sum is σ = 31423104700. Its totient is φ = 14110998336.

The previous prime is 21460477279. The next prime is 21460477327. The reversal of 21460477293 is 39277406412.

21460477293 is a `hidden beast` number, since 2 + 14 + 604 + 7 + 7 + 29 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5046255369 + 16414221924 = 71037^2 + 128118^2 .

It is not a de Polignac number, because 21460477293 - 2¹⁷ = 21460346221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21460477393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16331518 + ... + 16332831.

Almost surely, 2^21460477293 is an apocalyptic number.

It is an amenable number.

21460477293 is a deficient number, since it is larger than the sum of its proper divisors (9962627407).

21460477293 is a wasteful number, since it uses less digits than its factorization.

21460477293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32664428 (or 32664425 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 21460477293 in words is "twenty-one billion, four hundred sixty million, four hundred seventy-seven thousand, two hundred ninety-three".