3643346021 has 8 divisors (see below), whose sum is σ = 4298141184. Its totient is φ = 3022130160.

The previous prime is 3643346017. The next prime is 3643346039. The reversal of 3643346021 is 1206433463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3643346021 - 2² = 3643346017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643346071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8394590 + ... + 8395023.

It is an arithmetic number, because the mean of its divisors is an integer number (537267648).

Almost surely, 2^3643346021 is an apocalyptic number.

3643346021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3643346021 is a deficient number, since it is larger than the sum of its proper divisors (654795163).

3643346021 is a wasteful number, since it uses less digits than its factorization.

3643346021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16789651.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 3643346021 is about 60360.1360253603. The cubic root of 3643346021 is about 1538.7455378358.

Adding to 3643346021 its reverse (1206433463), we get a palindrome (4849779484).

The spelling of 3643346021 in words is "three billion, six hundred forty-three million, three hundred forty-six thousand, twenty-one".