20833983 has 8 divisors (see below), whose sum is σ = 30865200. Its totient is φ = 13889304.

The previous prime is 20833979. The next prime is 20833987. The reversal of 20833983 is 38933802.

It is an interprime number because it is at equal distance from previous prime (20833979) and next prime (20833987).

It is not a de Polignac number, because 20833983 - 2² = 20833979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20833987) 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, 385788 + ... + 385841.

It is an arithmetic number, because the mean of its divisors is an integer number (3858150).

Almost surely, 2^20833983 is an apocalyptic number.

20833983 is a deficient number, since it is larger than the sum of its proper divisors (10031217).

20833983 is an equidigital number, since it uses as much as digits as its factorization.

20833983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771638 (or 771632 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 20833983 is about 4564.4258127392. The cubic root of 20833983 is about 275.1634642476.

It can be divided in two parts, 208 and 33983, that added together give a triangular number (34191 = T₂₆₁).

The spelling of 20833983 in words is "twenty million, eight hundred thirty-three thousand, nine hundred eighty-three".