453340021 has 16 divisors (see below), whose sum is σ = 472501120. Its totient is φ = 434600640.

The previous prime is 453340007. The next prime is 453340031. The reversal of 453340021 is 120043354.

It is a cyclic number.

It is not a de Polignac number, because 453340021 - 2⁵ = 453339989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 453339974 and 453340001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (453340031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930640 + ... + 931126.

It is an arithmetic number, because the mean of its divisors is an integer number (29531320).

Almost surely, 2^453340021 is an apocalyptic number.

It is an amenable number.

453340021 is a deficient number, since it is larger than the sum of its proper divisors (19161099).

453340021 is a wasteful number, since it uses less digits than its factorization.

453340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 453340021 is about 21291.7829455403. The cubic root of 453340021 is about 768.2006791884.

Adding to 453340021 its reverse (120043354), we get a palindrome (573383375).

The spelling of 453340021 in words is "four hundred fifty-three million, three hundred forty thousand, twenty-one".