20283811 has 4 divisors (see below), whose sum is σ = 21351400. Its totient is φ = 19216224.

The previous prime is 20283799. The next prime is 20283821. The reversal of 20283811 is 11838202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20283811 - 2⁵ = 20283779 is a prime.

It is a super-2 number, since 2×20283811² = 822865977367442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20283821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533766 + ... + 533803.

It is an arithmetic number, because the mean of its divisors is an integer number (5337850).

Almost surely, 2^20283811 is an apocalyptic number.

20283811 is a deficient number, since it is larger than the sum of its proper divisors (1067589).

20283811 is a wasteful number, since it uses less digits than its factorization.

20283811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067588.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 20283811 is about 4503.7552109323. The cubic root of 20283811 is about 272.7197049786.

The spelling of 20283811 in words is "twenty million, two hundred eighty-three thousand, eight hundred eleven".