234403323420021 has 32 divisors (see below), whose sum is σ = 378207400359168. Its totient is φ = 126062172410880.

The previous prime is 234403323419917. The next prime is 234403323420023. The reversal of 234403323420021 is 120024323304432.

It is not a de Polignac number, because 234403323420021 - 2¹⁰ = 234403323418997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234403323420023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3910891 + ... + 22002311.

It is an arithmetic number, because the mean of its divisors is an integer number (11818981261224).

Almost surely, 2^{234403323420021} is an apocalyptic number.

234403323420021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

234403323420021 is a deficient number, since it is larger than the sum of its proper divisors (143804076939147).

234403323420021 is a wasteful number, since it uses less digits than its factorization.

234403323420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18127741.

The product of its (nonzero) digits is 82944, while the sum is 33.

Adding to 234403323420021 its reverse (120024323304432), we get a palindrome (354427646724453).

The spelling of 234403323420021 in words is "two hundred thirty-four trillion, four hundred three billion, three hundred twenty-three million, four hundred twenty thousand, twenty-one".