21318426892 has 48 divisors (see below), whose sum is σ = 45550839040. Its totient is φ = 8526399552.

The previous prime is 21318426869. The next prime is 21318426907. The reversal of 21318426892 is 29862481312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263403 + ... + 334690.

Almost surely, 2^21318426892 is an apocalyptic number.

It is an amenable number.

21318426892 is an abundant number, since it is smaller than the sum of its proper divisors (24232412148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21318426892 is a wasteful number, since it uses less digits than its factorization.

21318426892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598190 (or 598188 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The spelling of 21318426892 in words is "twenty-one billion, three hundred eighteen million, four hundred twenty-six thousand, eight hundred ninety-two".