21142034324 has 12 divisors (see below), whose sum is σ = 37696646484. Its totient is φ = 10371563904.

The previous prime is 21142034311. The next prime is 21142034327. The reversal of 21142034324 is 42343024112.

It can be written as a sum of positive squares in 2 ways, for example, as 12053844100 + 9088190224 = 109790^2 + 95332^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21142034293 and 21142034302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142034327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49863077 + ... + 49863500.

It is an arithmetic number, because the mean of its divisors is an integer number (3141387207).

Almost surely, 2^21142034324 is an apocalyptic number.

It is an amenable number.

21142034324 is a deficient number, since it is larger than the sum of its proper divisors (16554612160).

21142034324 is a wasteful number, since it uses less digits than its factorization.

21142034324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99726634 (or 99726632 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21142034324 its reverse (42343024112), we get a palindrome (63485058436).

The spelling of 21142034324 in words is "twenty-one billion, one hundred forty-two million, thirty-four thousand, three hundred twenty-four".