20283057 has 24 divisors (see below), whose sum is σ = 31752864. Its totient is φ = 12426624.

The previous prime is 20283037. The next prime is 20283061. The reversal of 20283057 is 75038202.

It is not a de Polignac number, because 20283057 - 2⁷ = 20282929 is a prime.

It is a super-2 number, since 2×20283057² = 822804802530498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20283057.

It is not an unprimeable number, because it can be changed into a prime (20283007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5038 + ... + 8120.

It is an arithmetic number, because the mean of its divisors is an integer number (1323036).

Almost surely, 2^20283057 is an apocalyptic number.

It is an amenable number.

20283057 is a deficient number, since it is larger than the sum of its proper divisors (11469807).

20283057 is a wasteful number, since it uses less digits than its factorization.

20283057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3149 (or 3146 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20283057 is about 4503.6715022302. The cubic root of 20283057 is about 272.7163257121.

The spelling of 20283057 in words is "twenty million, two hundred eighty-three thousand, fifty-seven".