20925533 has 2 divisors, whose sum is σ = 20925534. Its totient is φ = 20925532.

The previous prime is 20925467. The next prime is 20925571. The reversal of 20925533 is 33552902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11847364 + 9078169 = 3442^2 + 3013^2 .

It is a cyclic number.

It is not a de Polignac number, because 20925533 - 2¹⁰ = 20924509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20925496 and 20925505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20925433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10462766 + 10462767.

It is an arithmetic number, because the mean of its divisors is an integer number (10462767).

Almost surely, 2^20925533 is an apocalyptic number.

It is an amenable number.

20925533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20925533 is an equidigital number, since it uses as much as digits as its factorization.

20925533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 20925533 is about 4574.4434634172. The cubic root of 20925533 is about 275.5659221938.

The spelling of 20925533 in words is "twenty million, nine hundred twenty-five thousand, five hundred thirty-three".