3685018687021 has 4 divisors (see below), whose sum is σ = 4211449928032. Its totient is φ = 3158587446012.

The previous prime is 3685018686977. The next prime is 3685018687127. The reversal of 3685018687021 is 1207868105863.

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 3685018687021 - 2¹⁷ = 3685018555949 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 (3685018687421) 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, 263215620495 + ... + 263215620508.

It is an arithmetic number, because the mean of its divisors is an integer number (1052862482008).

Almost surely, 2^{3685018687021} is an apocalyptic number.

It is an amenable number.

3685018687021 is a deficient number, since it is larger than the sum of its proper divisors (526431241011).

3685018687021 is an equidigital number, since it uses as much as digits as its factorization.

3685018687021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526431241010.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 3685018687021 in words is "three trillion, six hundred eighty-five billion, eighteen million, six hundred eighty-seven thousand, twenty-one".