21641614612 has 24 divisors (see below), whose sum is σ = 40260860640. Its totient is φ = 10149789600.

The previous prime is 21641614597. The next prime is 21641614627.

21641614612 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (21641614597) and next prime (21641614627).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1402018 + ... + 1417369.

It is an arithmetic number, because the mean of its divisors is an integer number (1677535860).

Almost surely, 2^21641614612 is an apocalyptic number.

It is an amenable number.

21641614612 is a deficient number, since it is larger than the sum of its proper divisors (18619246028).

21641614612 is a wasteful number, since it uses less digits than its factorization.

21641614612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819511 (or 2819509 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The spelling of 21641614612 in words is "twenty-one billion, six hundred forty-one million, six hundred fourteen thousand, six hundred twelve".