693835984021 has 16 divisors (see below), whose sum is σ = 747394034688. Its totient is φ = 641776345600.

The previous prime is 693835984007. The next prime is 693835984067. The reversal of 693835984021 is 120489538396.

693835984021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 693835984021 - 2⁹ = 693835983509 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 (693835984001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1017760 + ... + 1556761.

It is an arithmetic number, because the mean of its divisors is an integer number (46712127168).

Almost surely, 2^693835984021 is an apocalyptic number.

It is an amenable number.

693835984021 is a deficient number, since it is larger than the sum of its proper divisors (53558050667).

693835984021 is a wasteful number, since it uses less digits than its factorization.

693835984021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574812.

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 693835984021 in words is "six hundred ninety-three billion, eight hundred thirty-five million, nine hundred eighty-four thousand, twenty-one".