20545433 has 2 divisors, whose sum is σ = 20545434. Its totient is φ = 20545432.

The previous prime is 20545423. The next prime is 20545477. The reversal of 20545433 is 33454502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12411529 + 8133904 = 3523^2 + 2852^2 .

It is a cyclic number.

It is not a de Polignac number, because 20545433 - 2¹⁶ = 20479897 is a prime.

It is a super-2 number, since 2×20545433² = 844229634314978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20545423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272716 + 10272717.

It is an arithmetic number, because the mean of its divisors is an integer number (10272717).

Almost surely, 2^20545433 is an apocalyptic number.

It is an amenable number.

20545433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20545433 is an equidigital number, since it uses as much as digits as its factorization.

20545433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 20545433 is about 4532.7070278146. The cubic root of 20545433 is about 273.8872189335.

Adding to 20545433 its reverse (33454502), we get a palindrome (53999935).

The spelling of 20545433 in words is "twenty million, five hundred forty-five thousand, four hundred thirty-three".