6422643021 has 16 divisors (see below), whose sum is σ = 8861016960. Its totient is φ = 4133088960.

The previous prime is 6422642987. The next prime is 6422643047. The reversal of 6422643021 is 1203462246.

It is not a de Polignac number, because 6422643021 - 2⁶ = 6422642957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6422643021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6422643121) 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, 514176 + ... + 526518.

It is an arithmetic number, because the mean of its divisors is an integer number (553813560).

Almost surely, 2^6422643021 is an apocalyptic number.

It is an amenable number.

6422643021 is a deficient number, since it is larger than the sum of its proper divisors (2438373939).

6422643021 is a wasteful number, since it uses less digits than its factorization.

6422643021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18356.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 6422643021 is about 80141.3939297290. The cubic root of 6422643021 is about 1858.8225311536.

It can be divided in two parts, 64 and 22643021, that added together give a triangular number (22643085 = T₆₇₂₉).

The spelling of 6422643021 in words is "six billion, four hundred twenty-two million, six hundred forty-three thousand, twenty-one".