6420042004 has 12 divisors (see below), whose sum is σ = 11447056404. Its totient is φ = 3149454464.

The previous prime is 6420041977. The next prime is 6420042007. The reversal of 6420042004 is 4002400246.

It can be written as a sum of positive squares in 2 ways, for example, as 1993801104 + 4426240900 = 44652^2 + 66530^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420042007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15141397 + ... + 15141820.

It is an arithmetic number, because the mean of its divisors is an integer number (953921367).

Almost surely, 2^6420042004 is an apocalyptic number.

It is an amenable number.

6420042004 is a deficient number, since it is larger than the sum of its proper divisors (5027014400).

6420042004 is a wasteful number, since it uses less digits than its factorization.

6420042004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30283274 (or 30283272 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 6420042004 is about 80125.1646113754. The cubic root of 6420042004 is about 1858.5715710324.

The spelling of 6420042004 in words is "six billion, four hundred twenty million, forty-two thousand, four".