400321204003423 has 4 divisors (see below), whose sum is σ = 400648531236048. Its totient is φ = 399993876770800.

The previous prime is 400321204003373. The next prime is 400321204003429. The reversal of 400321204003423 is 324300402123004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400321204003423 - 2²¹ = 400321201906271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400321204003391 and 400321204003400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400321204003429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163663614478 + ... + 163663616923.

It is an arithmetic number, because the mean of its divisors is an integer number (100162132809012).

Almost surely, 2^{400321204003423} is an apocalyptic number.

400321204003423 is a deficient number, since it is larger than the sum of its proper divisors (327327232625).

400321204003423 is a wasteful number, since it uses less digits than its factorization.

400321204003423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327327232624.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 400321204003423 its reverse (324300402123004), we get a palindrome (724621606126427).

The spelling of 400321204003423 in words is "four hundred trillion, three hundred twenty-one billion, two hundred four million, three thousand, four hundred twenty-three".