21374443203863 has 2 divisors, whose sum is σ = 21374443203864. Its totient is φ = 21374443203862.

The previous prime is 21374443203749. The next prime is 21374443203947. The reversal of 21374443203863 is 36830234447312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21374443203863 - 2¹⁰ = 21374443202839 is a prime.

It is a super-3 number, since 3×21374443203863³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21374443203263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10687221601931 + 10687221601932.

It is an arithmetic number, because the mean of its divisors is an integer number (10687221601932).

Almost surely, 2^{21374443203863} is an apocalyptic number.

21374443203863 is a deficient number, since it is larger than the sum of its proper divisors (1).

21374443203863 is an equidigital number, since it uses as much as digits as its factorization.

21374443203863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 50.

The spelling of 21374443203863 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred forty-three million, two hundred three thousand, eight hundred sixty-three".