21342142502 has 16 divisors (see below), whose sum is σ = 34333936560. Its totient is φ = 9918690912.

The previous prime is 21342142447. The next prime is 21342142649. The reversal of 21342142502 is 20524124312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5296433 + ... + 5300460.

It is an arithmetic number, because the mean of its divisors is an integer number (2145871035).

Almost surely, 2^21342142502 is an apocalyptic number.

21342142502 is a deficient number, since it is larger than the sum of its proper divisors (12991794058).

21342142502 is a wasteful number, since it uses less digits than its factorization.

21342142502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10596967.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 21342142502 its reverse (20524124312), we get a palindrome (41866266814).

The spelling of 21342142502 in words is "twenty-one billion, three hundred forty-two million, one hundred forty-two thousand, five hundred two".