400204402023 has 4 divisors (see below), whose sum is σ = 533605869368. Its totient is φ = 266802934680.

The previous prime is 400204401979. The next prime is 400204402033. The reversal of 400204402023 is 320204402004.

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

It is not a de Polignac number, because 400204402023 - 2⁶ = 400204401959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400204402033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66700733668 + ... + 66700733673.

It is an arithmetic number, because the mean of its divisors is an integer number (133401467342).

Almost surely, 2^400204402023 is an apocalyptic number.

400204402023 is a deficient number, since it is larger than the sum of its proper divisors (133401467345).

400204402023 is a wasteful number, since it uses less digits than its factorization.

400204402023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133401467344.

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 400204402023 its reverse (320204402004), we get a palindrome (720408804027).

The spelling of 400204402023 in words is "four hundred billion, two hundred four million, four hundred two thousand, twenty-three".