20306374433 has 2 divisors, whose sum is σ = 20306374434. Its totient is φ = 20306374432.

The previous prime is 20306374411. The next prime is 20306374453. The reversal of 20306374433 is 33447360302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19604760289 + 701614144 = 140017^2 + 26488^2 .

It is a cyclic number.

It is not a de Polignac number, because 20306374433 - 2¹⁴ = 20306358049 is a prime.

It is a super-2 number, since 2×20306374433² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20306374393 and 20306374402.

It is not a weakly prime, because it can be changed into another prime (20306374453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10153187216 + 10153187217.

It is an arithmetic number, because the mean of its divisors is an integer number (10153187217).

Almost surely, 2^20306374433 is an apocalyptic number.

It is an amenable number.

20306374433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20306374433 is an equidigital number, since it uses as much as digits as its factorization.

20306374433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 35.

The spelling of 20306374433 in words is "twenty billion, three hundred six million, three hundred seventy-four thousand, four hundred thirty-three".