20925433 has 2 divisors, whose sum is σ = 20925434. Its totient is φ = 20925432.

The previous prime is 20925389. The next prime is 20925439. The reversal of 20925433 is 33452902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19598329 + 1327104 = 4427^2 + 1152^2 .

It is a cyclic number.

It is not a de Polignac number, because 20925433 - 2¹³ = 20917241 is a prime.

It is not a weakly prime, because it can be changed into another prime (20925439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10462716 + 10462717.

It is an arithmetic number, because the mean of its divisors is an integer number (10462717).

Almost surely, 2^20925433 is an apocalyptic number.

It is an amenable number.

20925433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20925433 is an equidigital number, since it uses as much as digits as its factorization.

20925433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 20925433 is about 4574.4325331127. The cubic root of 20925433 is about 275.5654832303.

The spelling of 20925433 in words is "twenty million, nine hundred twenty-five thousand, four hundred thirty-three".