21672655627612 has 24 divisors (see below), whose sum is σ = 41379755784192. Its totient is φ = 9850091401200.

The previous prime is 21672655627607. The next prime is 21672655627613.

It is a happy number.

21672655627612 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21672655627613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27499578 + ... + 28276705.

It is an arithmetic number, because the mean of its divisors is an integer number (1724156491008).

Almost surely, 2^{21672655627612} is an apocalyptic number.

21672655627612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21672655627612 is a deficient number, since it is larger than the sum of its proper divisors (19707100156580).

21672655627612 is a wasteful number, since it uses less digits than its factorization.

21672655627612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55785129 (or 55785127 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 58.

The spelling of 21672655627612 in words is "twenty-one trillion, six hundred seventy-two billion, six hundred fifty-five million, six hundred twenty-seven thousand, six hundred twelve".