402001203423 has 16 divisors (see below), whose sum is σ = 537603106176. Its totient is φ = 267200216160.

The previous prime is 402001203413. The next prime is 402001203437. The reversal of 402001203423 is 324302100204.

It is not a de Polignac number, because 402001203423 - 2⁴ = 402001203407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402001203423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402001203413) 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, 15488565 + ... + 15514497.

It is an arithmetic number, because the mean of its divisors is an integer number (33600194136).

Almost surely, 2^402001203423 is an apocalyptic number.

402001203423 is a deficient number, since it is larger than the sum of its proper divisors (135601902753).

402001203423 is a wasteful number, since it uses less digits than its factorization.

402001203423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41174.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 402001203423 its reverse (324302100204), we get a palindrome (726303303627).

The spelling of 402001203423 in words is "four hundred two billion, one million, two hundred three thousand, four hundred twenty-three".