21460410686 has 24 divisors (see below), whose sum is σ = 38104854312. Its totient is φ = 9004366800.

The previous prime is 21460410667. The next prime is 21460410709. The reversal of 21460410686 is 68601406412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3407600 + ... + 3413891.

It is an arithmetic number, because the mean of its divisors is an integer number (1587702263).

Almost surely, 2^21460410686 is an apocalyptic number.

21460410686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21460410686 is a deficient number, since it is larger than the sum of its proper divisors (16644443626).

21460410686 is a wasteful number, since it uses less digits than its factorization.

21460410686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6821528 (or 6821517 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 21460410686 in words is "twenty-one billion, four hundred sixty million, four hundred ten thousand, six hundred eighty-six".