21374403403351 has 8 divisors (see below), whose sum is σ = 22111514964000. Its totient is φ = 20637296053920.

The previous prime is 21374403403343. The next prime is 21374403403417. The reversal of 21374403403351 is 15330430447312.

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

It is a cyclic number.

It is not a de Polignac number, because 21374403403351 - 2³ = 21374403403343 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 (21374403403051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12028425 + ... + 13690573.

It is an arithmetic number, because the mean of its divisors is an integer number (2763939370500).

Almost surely, 2^{21374403403351} is an apocalyptic number.

21374403403351 is a deficient number, since it is larger than the sum of its proper divisors (737111560649).

21374403403351 is a wasteful number, since it uses less digits than its factorization.

21374403403351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105609.

The product of its (nonzero) digits is 362880, while the sum is 40.

The spelling of 21374403403351 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred three million, four hundred three thousand, three hundred fifty-one".