21354743037401 has 4 divisors (see below), whose sum is σ = 21361130938752. Its totient is φ = 21348355136052.

The previous prime is 21354743037391. The next prime is 21354743037421. The reversal of 21354743037401 is 10473034745312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21354743037401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21354743037421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3193945661 + ... + 3193952346.

It is an arithmetic number, because the mean of its divisors is an integer number (5340282734688).

Almost surely, 2^{21354743037401} is an apocalyptic number.

It is an amenable number.

21354743037401 is a deficient number, since it is larger than the sum of its proper divisors (6387901351).

21354743037401 is an equidigital number, since it uses as much as digits as its factorization.

21354743037401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6387901350.

The product of its (nonzero) digits is 846720, while the sum is 44.

The spelling of 21354743037401 in words is "twenty-one trillion, three hundred fifty-four billion, seven hundred forty-three million, thirty-seven thousand, four hundred one".