3818330021 has 4 divisors (see below), whose sum is σ = 4165450944. Its totient is φ = 3471209100.

The previous prime is 3818330017. The next prime is 3818330069. The reversal of 3818330021 is 1200338183.

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 3818330021 - 2² = 3818330017 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 (3818320021) 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, 173560445 + ... + 173560466.

It is an arithmetic number, because the mean of its divisors is an integer number (1041362736).

Almost surely, 2^3818330021 is an apocalyptic number.

It is an amenable number.

3818330021 is a deficient number, since it is larger than the sum of its proper divisors (347120923).

3818330021 is a wasteful number, since it uses less digits than its factorization.

3818330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347120922.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 3818330021 is about 61792.6372717656. The cubic root of 3818330021 is about 1562.9958348385.

The spelling of 3818330021 in words is "three billion, eight hundred eighteen million, three hundred thirty thousand, twenty-one".