2403323021 has 4 divisors (see below), whose sum is σ = 2621806944. Its totient is φ = 2184839100.

The previous prime is 2403323011. The next prime is 2403323023. The reversal of 2403323021 is 1203233042.

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 2403323021 - 2¹⁰ = 2403321997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2403322984 and 2403323002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403323023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109241945 + ... + 109241966.

It is an arithmetic number, because the mean of its divisors is an integer number (655451736).

Almost surely, 2^2403323021 is an apocalyptic number.

It is an amenable number.

2403323021 is a deficient number, since it is larger than the sum of its proper divisors (218483923).

2403323021 is a wasteful number, since it uses less digits than its factorization.

2403323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218483922.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 2403323021 is about 49023.6985650818. The cubic root of 2403323021 is about 1339.4835428996.

Adding to 2403323021 its reverse (1203233042), we get a palindrome (3606556063).

The spelling of 2403323021 in words is "two billion, four hundred three million, three hundred twenty-three thousand, twenty-one".