402434130021 has 96 divisors (see below), whose sum is σ = 689758003200. Its totient is φ = 208463381280.

The previous prime is 402434130019. The next prime is 402434130041. The reversal of 402434130021 is 120031434204.

It is not a de Polignac number, because 402434130021 - 2¹ = 402434130019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402434129973 and 402434130000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402434130041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 45690400 + ... + 45699206.

It is an arithmetic number, because the mean of its divisors is an integer number (7184979200).

Almost surely, 2^402434130021 is an apocalyptic number.

It is an amenable number.

402434130021 is a deficient number, since it is larger than the sum of its proper divisors (287323873179).

402434130021 is a wasteful number, since it uses less digits than its factorization.

402434130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9220 (or 9195 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 402434130021 its reverse (120031434204), we get a palindrome (522465564225).

The spelling of 402434130021 in words is "four hundred two billion, four hundred thirty-four million, one hundred thirty thousand, twenty-one".