20283666 has 16 divisors (see below), whose sum is σ = 43688064. Its totient is φ = 6241104.

The previous prime is 20283617. The next prime is 20283667. The reversal of 20283666 is 66638202.

It is a super-2 number, since 2×20283666² = 822854212799112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20283667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129946 + ... + 130101.

It is an arithmetic number, because the mean of its divisors is an integer number (2730504).

Almost surely, 2^20283666 is an apocalyptic number.

20283666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20283666 is an abundant number, since it is smaller than the sum of its proper divisors (23404398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20283666 is a wasteful number, since it uses less digits than its factorization.

20283666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260065.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 20283666 is about 4503.7391132258. The cubic root of 20283666 is about 272.7190551261.

The spelling of 20283666 in words is "twenty million, two hundred eighty-three thousand, six hundred sixty-six".