20282564 has 24 divisors (see below), whose sum is σ = 37729440. Its totient is φ = 9507456.

The previous prime is 20282551. The next prime is 20282567. The reversal of 20282564 is 46528202.

It is a super-2 number, since 2×20282564² = 822764804828192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20282567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25379 + ... + 26165.

It is an arithmetic number, because the mean of its divisors is an integer number (1572060).

Almost surely, 2^20282564 is an apocalyptic number.

It is an amenable number.

20282564 is a deficient number, since it is larger than the sum of its proper divisors (17446876).

20282564 is a wasteful number, since it uses less digits than its factorization.

20282564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187 (or 1185 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 20282564 is about 4503.6167687760. The cubic root of 20282564 is about 272.7141161465.

The spelling of 20282564 in words is "twenty million, two hundred eighty-two thousand, five hundred sixty-four".