21424223000 has 32 divisors (see below), whose sum is σ = 50132684160. Its totient is φ = 8569688800.

The previous prime is 21424222979. The next prime is 21424223017. The reversal of 21424223000 is 32242412.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10711112 + ... + 10713111.

It is an arithmetic number, because the mean of its divisors is an integer number (1566646380).

Almost surely, 2^21424223000 is an apocalyptic number.

21424223000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21424223000 is an abundant number, since it is smaller than the sum of its proper divisors (28708461160).

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

21424223000 is a wasteful number, since it uses less digits than its factorization.

21424223000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21424244 (or 21424230 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21424223000 its reverse (32242412), we get a palindrome (21456465412).

The spelling of 21424223000 in words is "twenty-one billion, four hundred twenty-four million, two hundred twenty-three thousand".