6402434021 has 8 divisors (see below), whose sum is σ = 6421152864. Its totient is φ = 6383735280.

The previous prime is 6402433993. The next prime is 6402434033. The reversal of 6402434021 is 1204342046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6402434021 - 2⁶ = 6402433957 is a prime.

It is a super-2 number, since 2×6402434021² = 81982322786516456882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402434041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823211 + ... + 830951.

It is an arithmetic number, because the mean of its divisors is an integer number (802644108).

Almost surely, 2^6402434021 is an apocalyptic number.

It is an amenable number.

6402434021 is a deficient number, since it is larger than the sum of its proper divisors (18718843).

6402434021 is a wasteful number, since it uses less digits than its factorization.

6402434021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 6402434021 is about 80015.2111851240. The cubic root of 6402434021 is about 1856.8708728777.

Adding to 6402434021 its reverse (1204342046), we get a palindrome (7606776067).

The spelling of 6402434021 in words is "six billion, four hundred two million, four hundred thirty-four thousand, twenty-one".