21202636342 has 24 divisors (see below), whose sum is σ = 33271682976. Its totient is φ = 10132820016.

The previous prime is 21202636333. The next prime is 21202636361. The reversal of 21202636342 is 24363620212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1566508 + ... + 1579984.

It is an arithmetic number, because the mean of its divisors is an integer number (1386320124).

Almost surely, 2^21202636342 is an apocalyptic number.

21202636342 is a deficient number, since it is larger than the sum of its proper divisors (12069046634).

21202636342 is a wasteful number, since it uses less digits than its factorization.

21202636342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15012 (or 14989 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The spelling of 21202636342 in words is "twenty-one billion, two hundred two million, six hundred thirty-six thousand, three hundred forty-two".