21324422142 has 24 divisors (see below), whose sum is σ = 47277402744. Its totient is φ = 6942834864.

The previous prime is 21324422113. The next prime is 21324422149. The reversal of 21324422142 is 24122442312.

It is a happy number.

21324422142 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 442 + 214 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324422149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13774693 + ... + 13776240.

It is an arithmetic number, because the mean of its divisors is an integer number (1969891781).

Almost surely, 2^21324422142 is an apocalyptic number.

21324422142 is an abundant number, since it is smaller than the sum of its proper divisors (25952980602).

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

21324422142 is a wasteful number, since it uses less digits than its factorization.

21324422142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27550984 (or 27550981 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

Adding to 21324422142 its reverse (24122442312), we get a palindrome (45446864454).

The spelling of 21324422142 in words is "twenty-one billion, three hundred twenty-four million, four hundred twenty-two thousand, one hundred forty-two".