21142402324 has 24 divisors (see below), whose sum is σ = 38304957600. Its totient is φ = 10198698720.

The previous prime is 21142402321. The next prime is 21142402373. The reversal of 21142402324 is 42320424112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142402321) 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, 79167 + ... + 220345.

It is an arithmetic number, because the mean of its divisors is an integer number (1596039900).

Almost surely, 2^21142402324 is an apocalyptic number.

It is an amenable number.

21142402324 is a deficient number, since it is larger than the sum of its proper divisors (17162555276).

21142402324 is a wasteful number, since it uses less digits than its factorization.

21142402324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142503 (or 142501 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21142402324 its reverse (42320424112), we get a palindrome (63462826436).

The spelling of 21142402324 in words is "twenty-one billion, one hundred forty-two million, four hundred two thousand, three hundred twenty-four".