21460434186 has 32 divisors (see below), whose sum is σ = 43417684800. Its totient is φ = 7070729600.

The previous prime is 21460434181. The next prime is 21460434187. The reversal of 21460434186 is 68143406412.

It is not an unprimeable number, because it can be changed into a prime (21460434181) 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, 2372320 + ... + 2381348.

It is an arithmetic number, because the mean of its divisors is an integer number (1356802650).

Almost surely, 2^21460434186 is an apocalyptic number.

21460434186 is an abundant number, since it is smaller than the sum of its proper divisors (21957250614).

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

21460434186 is a wasteful number, since it uses less digits than its factorization.

21460434186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13574.

The product of its (nonzero) digits is 110592, while the sum is 39.

The spelling of 21460434186 in words is "twenty-one billion, four hundred sixty million, four hundred thirty-four thousand, one hundred eighty-six".