21238186896 has 60 divisors (see below), whose sum is σ = 59992959312. Its totient is φ = 7013227968.

The previous prime is 21238186861. The next prime is 21238186927. The reversal of 21238186896 is 69868183212.

It is a super-2 number, since 2×21238186896² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 673786 + ... + 704601.

Almost surely, 2^21238186896 is an apocalyptic number.

It is an amenable number.

21238186896 is an abundant number, since it is smaller than the sum of its proper divisors (38754772416).

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

21238186896 is a wasteful number, since it uses less digits than its factorization.

21238186896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378508 (or 1378499 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The spelling of 21238186896 in words is "twenty-one billion, two hundred thirty-eight million, one hundred eighty-six thousand, eight hundred ninety-six".