4350040021 has 4 divisors (see below), whose sum is σ = 4442594112. Its totient is φ = 4257485932.

The previous prime is 4350040007. The next prime is 4350040033. The reversal of 4350040021 is 1200400534.

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 4350040021 - 2⁵ = 4350039989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4350043021) 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, 46276975 + ... + 46277068.

It is an arithmetic number, because the mean of its divisors is an integer number (1110648528).

Almost surely, 2^4350040021 is an apocalyptic number.

It is an amenable number.

4350040021 is a deficient number, since it is larger than the sum of its proper divisors (92554091).

4350040021 is an equidigital number, since it uses as much as digits as its factorization.

4350040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92554090.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 4350040021 is about 65954.8331890848. The cubic root of 4350040021 is about 1632.4169072024.

Adding to 4350040021 its reverse (1200400534), we get a palindrome (5550440555).

It can be divided in two parts, 43500 and 40021, that added together give a 4-th power (83521 = 17⁴).

The spelling of 4350040021 in words is "four billion, three hundred fifty million, forty thousand, twenty-one".