21198843588 has 24 divisors (see below), whose sum is σ = 53268889408. Its totient is φ = 6522721056.

The previous prime is 21198843587. The next prime is 21198843637. The reversal of 21198843588 is 88534889112.

It is not an unprimeable number, because it can be changed into a prime (21198843581) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 67944856 + ... + 67945167.

Almost surely, 2^21198843588 is an apocalyptic number.

It is an amenable number.

21198843588 is an abundant number, since it is smaller than the sum of its proper divisors (32070045820).

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

21198843588 is a wasteful number, since it uses less digits than its factorization.

21198843588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135890043 (or 135890041 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 57.

The spelling of 21198843588 in words is "twenty-one billion, one hundred ninety-eight million, eight hundred forty-three thousand, five hundred eighty-eight".