21606460612 has 12 divisors (see below), whose sum is σ = 41248697616. Its totient is φ = 9821118440.

The previous prime is 21606460583. The next prime is 21606460723.

21606460612 is nontrivially palindromic in base 10.

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, 245527918 + ... + 245528005.

It is an arithmetic number, because the mean of its divisors is an integer number (3437391468).

Almost surely, 2^21606460612 is an apocalyptic number.

21606460612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21606460612 is a deficient number, since it is larger than the sum of its proper divisors (19642237004).

21606460612 is a wasteful number, since it uses less digits than its factorization.

21606460612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491055938 (or 491055936 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

It can be divided in two parts, 216064 and 60612, that added together give a square (276676 = 526²).

The spelling of 21606460612 in words is "twenty-one billion, six hundred six million, four hundred sixty thousand, six hundred twelve".