404001430021 has 8 divisors (see below), whose sum is σ = 486016758080. Its totient is φ = 328061311488.

The previous prime is 404001430013. The next prime is 404001430057. The reversal of 404001430021 is 120034100404.

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 404001430021 - 2³ = 404001430013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404001430081) 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, 1518802236 + ... + 1518802501.

It is an arithmetic number, because the mean of its divisors is an integer number (60752094760).

Almost surely, 2^404001430021 is an apocalyptic number.

It is an amenable number.

404001430021 is a deficient number, since it is larger than the sum of its proper divisors (82015328059).

404001430021 is a wasteful number, since it uses less digits than its factorization.

404001430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037604763.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 404001430021 its reverse (120034100404), we get a palindrome (524035530425).

The spelling of 404001430021 in words is "four hundred four billion, one million, four hundred thirty thousand, twenty-one".