21374838427343 has 2 divisors, whose sum is σ = 21374838427344. Its totient is φ = 21374838427342.

The previous prime is 21374838427193. The next prime is 21374838427429. The reversal of 21374838427343 is 34372483847312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21374838427343 - 2¹² = 21374838423247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21374838420343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10687419213671 + 10687419213672.

It is an arithmetic number, because the mean of its divisors is an integer number (10687419213672).

Almost surely, 2^{21374838427343} is an apocalyptic number.

21374838427343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21374838427343 is an equidigital number, since it uses as much as digits as its factorization.

21374838427343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65028096, while the sum is 59.

The spelling of 21374838427343 in words is "twenty-one trillion, three hundred seventy-four billion, eight hundred thirty-eight million, four hundred twenty-seven thousand, three hundred forty-three".