20412559 has 2 divisors, whose sum is σ = 20412560. Its totient is φ = 20412558.

The previous prime is 20412541. The next prime is 20412599. The reversal of 20412559 is 95521402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20412559 - 2⁹ = 20412047 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20412599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206279 + 10206280.

It is an arithmetic number, because the mean of its divisors is an integer number (10206280).

Almost surely, 2^20412559 is an apocalyptic number.

20412559 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412559 is an equidigital number, since it uses as much as digits as its factorization.

20412559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 20412559 is about 4518.0260070079. The cubic root of 20412559 is about 273.2955022333.

The spelling of 20412559 in words is "twenty million, four hundred twelve thousand, five hundred fifty-nine".