21838060188 has 48 divisors (see below), whose sum is σ = 64705365760. Its totient is φ = 6239445552.

The previous prime is 21838060187. The next prime is 21838060241. The reversal of 21838060188 is 88106083812.

21838060188 is a `hidden beast` number, since 2 + 1 + 8 + 38 + 0 + 601 + 8 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21838060187) by changing a digit.

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, 14442406 + ... + 14443917.

Almost surely, 2^21838060188 is an apocalyptic number.

21838060188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21838060188 is an abundant number, since it is smaller than the sum of its proper divisors (42867305572).

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

21838060188 is a wasteful number, since it uses less digits than its factorization.

21838060188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28886343 (or 28886335 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 21838060188 in words is "twenty-one billion, eight hundred thirty-eight million, sixty thousand, one hundred eighty-eight".