16920018435533 has 2 divisors, whose sum is σ = 16920018435534. Its totient is φ = 16920018435532.

The previous prime is 16920018435503. The next prime is 16920018435569. The reversal of 16920018435533 is 33553481002961.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16785720373444 + 134298062089 = 4097038^2 + 366467^2 .

It is a cyclic number.

It is not a de Polignac number, because 16920018435533 - 2⁶ = 16920018435469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16920018435503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8460009217766 + 8460009217767.

It is an arithmetic number, because the mean of its divisors is an integer number (8460009217767).

Almost surely, 2^{16920018435533} is an apocalyptic number.

It is an amenable number.

16920018435533 is a deficient number, since it is larger than the sum of its proper divisors (1).

16920018435533 is an equidigital number, since it uses as much as digits as its factorization.

16920018435533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 16920018435533 in words is "sixteen trillion, nine hundred twenty billion, eighteen million, four hundred thirty-five thousand, five hundred thirty-three".