20833333257 has 16 divisors (see below), whose sum is σ = 31122032832. Its totient is φ = 12285011520.

The previous prime is 20833333249. The next prime is 20833333267. The reversal of 20833333257 is 75233333802.

It is not a de Polignac number, because 20833333257 - 2³ = 20833333249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20833333267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8530038 + ... + 8532479.

It is an arithmetic number, because the mean of its divisors is an integer number (1945127052).

Almost surely, 2^20833333257 is an apocalyptic number.

It is an amenable number.

20833333257 is a deficient number, since it is larger than the sum of its proper divisors (10288699575).

20833333257 is a wasteful number, since it uses less digits than its factorization.

20833333257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17062568.

The product of its (nonzero) digits is 272160, while the sum is 39.

The spelling of 20833333257 in words is "twenty billion, eight hundred thirty-three million, three hundred thirty-three thousand, two hundred fifty-seven".