20283858 has 80 divisors (see below), whose sum is σ = 53712384. Its totient is φ = 5598720.

The previous prime is 20283841. The next prime is 20283863. The reversal of 20283858 is 85838202.

It is a super-2 number, since 2×20283858² = 822869790728328, which contains 22 as substring.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 34866 + ... + 35442.

Almost surely, 2^20283858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20283858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26856192).

20283858 is an abundant number, since it is smaller than the sum of its proper divisors (33428526).

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

20283858 is a wasteful number, since it uses less digits than its factorization.

20283858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 20283858 is about 4503.7604287973. The cubic root of 20283858 is about 272.7199156197.

It can be divided in two parts, 2028 and 3858, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 20283858 in words is "twenty million, two hundred eighty-three thousand, eight hundred fifty-eight".