20289255 has 32 divisors (see below), whose sum is σ = 37622784. Its totient is φ = 9144576.

The previous prime is 20289193. The next prime is 20289277. The reversal of 20289255 is 55298202.

It is not a de Polignac number, because 20289255 - 2⁸ = 20288999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6342 + ... + 8988.

It is an arithmetic number, because the mean of its divisors is an integer number (1175712).

Almost surely, 2^20289255 is an apocalyptic number.

20289255 is a deficient number, since it is larger than the sum of its proper divisors (17333529).

20289255 is a wasteful number, since it uses less digits than its factorization.

20289255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 20289255 is about 4504.3595549201. The cubic root of 20289255 is about 272.7441013353.

The spelling of 20289255 in words is "twenty million, two hundred eighty-nine thousand, two hundred fifty-five".