20354621333 has 2 divisors, whose sum is σ = 20354621334. Its totient is φ = 20354621332.

The previous prime is 20354621323. The next prime is 20354621369. The reversal of 20354621333 is 33312645302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18112314724 + 2242306609 = 134582^2 + 47353^2 .

It is a cyclic number.

It is not a de Polignac number, because 20354621333 - 2⁶ = 20354621269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20354621333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20354621323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177310666 + 10177310667.

It is an arithmetic number, because the mean of its divisors is an integer number (10177310667).

Almost surely, 2^20354621333 is an apocalyptic number.

It is an amenable number.

20354621333 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354621333 is an equidigital number, since it uses as much as digits as its factorization.

20354621333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 32.

The spelling of 20354621333 in words is "twenty billion, three hundred fifty-four million, six hundred twenty-one thousand, three hundred thirty-three".