21654433445612 has 24 divisors (see below), whose sum is σ = 41340769336272. Its totient is φ = 9842808268800.

The previous prime is 21654433445573. The next prime is 21654433445621.

21654433445612 is nontrivially palindromic in base 10.

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, 931412 + ... + 6646532.

It is an arithmetic number, because the mean of its divisors is an integer number (1722532055678).

Almost surely, 2^{21654433445612} is an apocalyptic number.

21654433445612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21654433445612 is a deficient number, since it is larger than the sum of its proper divisors (19686335890660).

21654433445612 is a wasteful number, since it uses less digits than its factorization.

21654433445612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5801249 (or 5801247 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 50.

The spelling of 21654433445612 in words is "twenty-one trillion, six hundred fifty-four billion, four hundred thirty-three million, four hundred forty-five thousand, six hundred twelve".