21418052697383 has 2 divisors, whose sum is σ = 21418052697384. Its totient is φ = 21418052697382.

The previous prime is 21418052697359. The next prime is 21418052697421. The reversal of 21418052697383 is 38379625081412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21418052697383 - 2⁶ = 21418052697319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21418052691383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10709026348691 + 10709026348692.

It is an arithmetic number, because the mean of its divisors is an integer number (10709026348692).

It is a 2-persistent number, because it is pandigital, and so is 2⋅21418052697383 = 42836105394766, but 3⋅21418052697383 = 64254158092149 is not.

Almost surely, 2^{21418052697383} is an apocalyptic number.

21418052697383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21418052697383 is an equidigital number, since it uses as much as digits as its factorization.

21418052697383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 21418052697383 in words is "twenty-one trillion, four hundred eighteen billion, fifty-two million, six hundred ninety-seven thousand, three hundred eighty-three".