21374336147551 has 8 divisors (see below), whose sum is σ = 22304826301824. Its totient is φ = 20443943592600.

The previous prime is 21374336147533. The next prime is 21374336147569. The reversal of 21374336147551 is 15574163347312.

It is an interprime number because it is at equal distance from previous prime (21374336147533) and next prime (21374336147569).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21374336147551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374336148551) 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, 23952121 + ... + 24828466.

It is an arithmetic number, because the mean of its divisors is an integer number (2788103287728).

Almost surely, 2^{21374336147551} is an apocalyptic number.

21374336147551 is a deficient number, since it is larger than the sum of its proper divisors (930490154273).

21374336147551 is a wasteful number, since it uses less digits than its factorization.

21374336147551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48799661.

The product of its digits is 6350400, while the sum is 52.

The spelling of 21374336147551 in words is "twenty-one trillion, three hundred seventy-four billion, three hundred thirty-six million, one hundred forty-seven thousand, five hundred fifty-one".