6921206984 has 16 divisors (see below), whose sum is σ = 13070626800. Its totient is φ = 3435706512.

The previous prime is 6921206977. The next prime is 6921206993. The reversal of 6921206984 is 4896021296.

It is a super-2 number, since 2×6921206984² = 95806212230740752512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3110942 + ... + 3113165.

It is an arithmetic number, because the mean of its divisors is an integer number (816914175).

Almost surely, 2^6921206984 is an apocalyptic number.

It is an amenable number.

6921206984 is a deficient number, since it is larger than the sum of its proper divisors (6149419816).

6921206984 is a wasteful number, since it uses less digits than its factorization.

6921206984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6224252 (or 6224248 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 6921206984 is about 83193.7917395283. The cubic root of 6921206984 is about 1905.7266727557.

The spelling of 6921206984 in words is "six billion, nine hundred twenty-one million, two hundred six thousand, nine hundred eighty-four".