21754661547734 has 4 divisors (see below), whose sum is σ = 32631992321604. Its totient is φ = 10877330773866.

The previous prime is 21754661547679. The next prime is 21754661547809. The reversal of 21754661547734 is 43774516645712.

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, 5438665386932 + ... + 5438665386935.

It is an arithmetic number, because the mean of its divisors is an integer number (8157998080401).

Almost surely, 2^{21754661547734} is an apocalyptic number.

21754661547734 is a deficient number, since it is larger than the sum of its proper divisors (10877330773870).

21754661547734 is a wasteful number, since it uses less digits than its factorization.

21754661547734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10877330773869.

The product of its digits is 118540800, while the sum is 62.

The spelling of 21754661547734 in words is "twenty-one trillion, seven hundred fifty-four billion, six hundred sixty-one million, five hundred forty-seven thousand, seven hundred thirty-four".