20368433 has 4 divisors (see below), whose sum is σ = 20388900. Its totient is φ = 20347968.

The previous prime is 20368423. The next prime is 20368441. The reversal of 20368433 is 33486302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33486302 = 2 ⋅16743151.

It can be written as a sum of positive squares in 2 ways, for example, as 7573504 + 12794929 = 2752^2 + 3577^2 .

It is a cyclic number.

It is not a de Polignac number, because 20368433 - 2⁴ = 20368417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20368396 and 20368405.

It is not an unprimeable number, because it can be changed into a prime (20368423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8660 + ... + 10757.

It is an arithmetic number, because the mean of its divisors is an integer number (5097225).

Almost surely, 2^20368433 is an apocalyptic number.

It is an amenable number.

20368433 is a deficient number, since it is larger than the sum of its proper divisors (20467).

20368433 is a wasteful number, since it uses less digits than its factorization.

20368433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20466.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 20368433 is about 4513.1400377121. The cubic root of 20368433 is about 273.0984317689.

The spelling of 20368433 in words is "twenty million, three hundred sixty-eight thousand, four hundred thirty-three".