21342199998 has 24 divisors (see below), whose sum is σ = 49653282312. Its totient is φ = 6097771344.

The previous prime is 21342199987. The next prime is 21342200039. The reversal of 21342199998 is 89999124312.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

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, 36295965 + ... + 36296552.

It is an arithmetic number, because the mean of its divisors is an integer number (2068886763).

Almost surely, 2^21342199998 is an apocalyptic number.

21342199998 is an abundant number, since it is smaller than the sum of its proper divisors (28311082314).

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

21342199998 is a wasteful number, since it uses less digits than its factorization.

21342199998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72592536 (or 72592529 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 57.

The spelling of 21342199998 in words is "twenty-one billion, three hundred forty-two million, one hundred ninety-nine thousand, nine hundred ninety-eight".