21742363355326 has 4 divisors (see below), whose sum is σ = 32613545032992. Its totient is φ = 10871181677662.

The previous prime is 21742363355231. The next prime is 21742363355359. The reversal of 21742363355326 is 62355336324712.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5435590838830 + ... + 5435590838833.

It is an arithmetic number, because the mean of its divisors is an integer number (8153386258248).

Almost surely, 2^{21742363355326} is an apocalyptic number.

21742363355326 is a deficient number, since it is larger than the sum of its proper divisors (10871181677666).

21742363355326 is a wasteful number, since it uses less digits than its factorization.

21742363355326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10871181677665.

The product of its digits is 16329600, while the sum is 52.

The spelling of 21742363355326 in words is "twenty-one trillion, seven hundred forty-two billion, three hundred sixty-three million, three hundred fifty-five thousand, three hundred twenty-six".