3924783684021 has 8 divisors (see below), whose sum is σ = 5401852812544. Its totient is φ = 2532118505760.

The previous prime is 3924783684013. The next prime is 3924783684037. The reversal of 3924783684021 is 1204863874293.

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

It is not a de Polignac number, because 3924783684021 - 2³ = 3924783684013 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 (3924783684121) 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, 21100987456 + ... + 21100987641.

It is an arithmetic number, because the mean of its divisors is an integer number (675231601568).

Almost surely, 2^{3924783684021} is an apocalyptic number.

3924783684021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3924783684021 is a deficient number, since it is larger than the sum of its proper divisors (1477069128523).

3924783684021 is a wasteful number, since it uses less digits than its factorization.

3924783684021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42201975131.

The product of its (nonzero) digits is 13934592, while the sum is 57.

The spelling of 3924783684021 in words is "three trillion, nine hundred twenty-four billion, seven hundred eighty-three million, six hundred eighty-four thousand, twenty-one".