21423234024 has 64 divisors (see below), whose sum is σ = 59521392000. Its totient is φ = 7139589120.

The previous prime is 21423233969. The next prime is 21423234037. The reversal of 21423234024 is 42043232412.

21423234024 is a `hidden beast` number, since 2 + 1 + 423 + 234 + 0 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1626184 + ... + 1639304.

It is an arithmetic number, because the mean of its divisors is an integer number (930021750).

Almost surely, 2^21423234024 is an apocalyptic number.

21423234024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21423234024 is an abundant number, since it is smaller than the sum of its proper divisors (38098157976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21423234024 is a wasteful number, since it uses less digits than its factorization.

21423234024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20695 (or 20685 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21423234024 its reverse (42043232412), we get a palindrome (63466466436).

The spelling of 21423234024 in words is "twenty-one billion, four hundred twenty-three million, two hundred thirty-four thousand, twenty-four".