20382282257 has 4 divisors (see below), whose sum is σ = 20421254640. Its totient is φ = 20343309876.

The previous prime is 20382282253. The next prime is 20382282259. The reversal of 20382282257 is 75228228302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20382282257 - 2² = 20382282253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20382282253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19485407 + ... + 19486452.

It is an arithmetic number, because the mean of its divisors is an integer number (5105313660).

Almost surely, 2^20382282257 is an apocalyptic number.

It is an amenable number.

20382282257 is a deficient number, since it is larger than the sum of its proper divisors (38972383).

20382282257 is an equidigital number, since it uses as much as digits as its factorization.

20382282257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38972382.

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 20382282257 in words is "twenty billion, three hundred eighty-two million, two hundred eighty-two thousand, two hundred fifty-seven".