21423033120 has 96 divisors (see below), whose sum is σ = 69809584320. Its totient is φ = 5515811840.

The previous prime is 21423033103. The next prime is 21423033143. The reversal of 21423033120 is 2133032412.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 755586 + ... + 783425.

It is an arithmetic number, because the mean of its divisors is an integer number (727183170).

Almost surely, 2^21423033120 is an apocalyptic number.

21423033120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21423033120 is an abundant number, since it is smaller than the sum of its proper divisors (48386551200).

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

21423033120 is a wasteful number, since it uses less digits than its factorization.

21423033120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539058 (or 1539050 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21423033120 its reverse (2133032412), we get a palindrome (23556065532).

The spelling of 21423033120 in words is "twenty-one billion, four hundred twenty-three million, thirty-three thousand, one hundred twenty".