20213033 has 4 divisors (see below), whose sum is σ = 20271300. Its totient is φ = 20154768.

The previous prime is 20212991. The next prime is 20213047. The reversal of 20213033 is 33031202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33031202 = 2 ⋅16515601.

It can be written as a sum of positive squares in 2 ways, for example, as 14077504 + 6135529 = 3752^2 + 2477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212999 and 20213017.

It is not an unprimeable number, because it can be changed into a prime (20213233) 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, 28610 + ... + 29307.

It is an arithmetic number, because the mean of its divisors is an integer number (5067825).

Almost surely, 2^20213033 is an apocalyptic number.

It is an amenable number.

20213033 is a deficient number, since it is larger than the sum of its proper divisors (58267).

20213033 is an equidigital number, since it uses as much as digits as its factorization.

20213033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58266.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20213033 is about 4495.8906792759. The cubic root of 20213033 is about 272.4021274082.

Adding to 20213033 its reverse (33031202), we get a palindrome (53244235).

The spelling of 20213033 in words is "twenty million, two hundred thirteen thousand, thirty-three".