20283994 has 4 divisors (see below), whose sum is σ = 30425994. Its totient is φ = 10141996.

The previous prime is 20283983. The next prime is 20283997. The reversal of 20283994 is 49938202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49938202 = 2 ⋅24969101.

It can be written as a sum of positive squares in only one way, i.e., 16916769 + 3367225 = 4113^2 + 1835^2 .

It is a super-2 number, since 2×20283994² = 822880825184072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20283997) 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 as a sum of consecutive naturals, namely, 5070997 + ... + 5071000.

Almost surely, 2^20283994 is an apocalyptic number.

20283994 is a deficient number, since it is larger than the sum of its proper divisors (10142000).

20283994 is a wasteful number, since it uses less digits than its factorization.

20283994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10141999.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 20283994 is about 4503.7755272660. The cubic root of 20283994 is about 272.7205251327.

The spelling of 20283994 in words is "twenty million, two hundred eighty-three thousand, nine hundred ninety-four".