21302424142 has 32 divisors (see below), whose sum is σ = 35308224000. Its totient is φ = 9594037728.

The previous prime is 21302424133. The next prime is 21302424167. The reversal of 21302424142 is 24142420312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72984 + ... + 218932.

It is an arithmetic number, because the mean of its divisors is an integer number (1103382000).

Almost surely, 2^21302424142 is an apocalyptic number.

21302424142 is a deficient number, since it is larger than the sum of its proper divisors (14005799858).

21302424142 is a wasteful number, since it uses less digits than its factorization.

21302424142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146160.

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

Adding to 21302424142 its reverse (24142420312), we get a palindrome (45444844454).

The spelling of 21302424142 in words is "twenty-one billion, three hundred two million, four hundred twenty-four thousand, one hundred forty-two".