6890476021 has 16 divisors (see below), whose sum is σ = 8097546240. Its totient is φ = 5780473920.

The previous prime is 6890476007. The next prime is 6890476037. The reversal of 6890476021 is 1206740986.

It is not a de Polignac number, because 6890476021 - 2⁹ = 6890475509 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 (6890476121) 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, 727311 + ... + 736723.

It is an arithmetic number, because the mean of its divisors is an integer number (506096640).

Almost surely, 2^6890476021 is an apocalyptic number.

It is an amenable number.

6890476021 is a deficient number, since it is larger than the sum of its proper divisors (1207070219).

6890476021 is a wasteful number, since it uses less digits than its factorization.

6890476021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14556.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 6890476021 is about 83008.8912165438. The cubic root of 6890476021 is about 1902.9019386380.

The spelling of 6890476021 in words is "six billion, eight hundred ninety million, four hundred seventy-six thousand, twenty-one".