6921948290 has 32 divisors (see below), whose sum is σ = 12562680960. Its totient is φ = 2745892224.

The previous prime is 6921948289. The next prime is 6921948323. The reversal of 6921948290 is 928491296.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1997099 + ... + 2000561.

It is an arithmetic number, because the mean of its divisors is an integer number (392583780).

Almost surely, 2^6921948290 is an apocalyptic number.

6921948290 is a deficient number, since it is larger than the sum of its proper divisors (5640732670).

6921948290 is a wasteful number, since it uses less digits than its factorization.

6921948290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5066.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 6921948290 is about 83198.2469166268. The cubic root of 6921948290 is about 1905.7947088745.

The spelling of 6921948290 in words is "six billion, nine hundred twenty-one million, nine hundred forty-eight thousand, two hundred ninety".