21142022324 has 24 divisors (see below), whose sum is σ = 39759632640. Its totient is φ = 9800689536.

The previous prime is 21142022309. The next prime is 21142022329. The reversal of 21142022324 is 42322024112.

It is a self number, because there is not a number n which added to its sum of digits gives 21142022324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142022329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2315684 + ... + 2324795.

It is an arithmetic number, because the mean of its divisors is an integer number (1656651360).

Almost surely, 2^21142022324 is an apocalyptic number.

It is an amenable number.

21142022324 is a deficient number, since it is larger than the sum of its proper divisors (18617610316).

21142022324 is a wasteful number, since it uses less digits than its factorization.

21142022324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640567 (or 4640565 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21142022324 its reverse (42322024112), we get a palindrome (63464046436).

The spelling of 21142022324 in words is "twenty-one billion, one hundred forty-two million, twenty-two thousand, three hundred twenty-four".