20078533 has 2 divisors, whose sum is σ = 20078534. Its totient is φ = 20078532.

The previous prime is 20078521. The next prime is 20078551. The reversal of 20078533 is 33587002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16630084 + 3448449 = 4078^2 + 1857^2 .

It is a cyclic number.

It is not a de Polignac number, because 20078533 - 2⁹ = 20078021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20078593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10039266 + 10039267.

It is an arithmetic number, because the mean of its divisors is an integer number (10039267).

Almost surely, 2^20078533 is an apocalyptic number.

It is an amenable number.

20078533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20078533 is an equidigital number, since it uses as much as digits as its factorization.

20078533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20078533 is about 4480.9076089560. The cubic root of 20078533 is about 271.7965832417.

The spelling of 20078533 in words is "twenty million, seventy-eight thousand, five hundred thirty-three".