20903459 has 2 divisors, whose sum is σ = 20903460. Its totient is φ = 20903458.

The previous prime is 20903437. The next prime is 20903497. The reversal of 20903459 is 95430902.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20903459 is a prime.

It is not a weakly prime, because it can be changed into another prime (20900459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10451729 + 10451730.

It is an arithmetic number, because the mean of its divisors is an integer number (10451730).

Almost surely, 2^20903459 is an apocalyptic number.

20903459 is a deficient number, since it is larger than the sum of its proper divisors (1).

20903459 is an equidigital number, since it uses as much as digits as its factorization.

20903459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 20903459 is about 4572.0300742668. The cubic root of 20903459 is about 275.4689914518.

The spelling of 20903459 in words is "twenty million, nine hundred three thousand, four hundred fifty-nine".