20402033 has 4 divisors (see below), whose sum is σ = 20483568. Its totient is φ = 20320500.

The previous prime is 20402021. The next prime is 20402087. The reversal of 20402033 is 33020402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20402033 - 2⁴ = 20402017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20401999 and 20402017.

It is not an unprimeable number, because it can be changed into a prime (20402233) 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, 40391 + ... + 40892.

It is an arithmetic number, because the mean of its divisors is an integer number (5120892).

Almost surely, 2^20402033 is an apocalyptic number.

It is an amenable number.

20402033 is a deficient number, since it is larger than the sum of its proper divisors (81535).

20402033 is an equidigital number, since it uses as much as digits as its factorization.

20402033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81534.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 20402033 is about 4516.8609675304. The cubic root of 20402033 is about 273.2485180365.

Adding to 20402033 its reverse (33020402), we get a palindrome (53422435).

The spelling of 20402033 in words is "twenty million, four hundred two thousand, thirty-three".