21186266690000 has 100 divisors (see below), whose sum is σ = 53524247833056. Its totient is φ = 8106049776000.

The previous prime is 21186266689999. The next prime is 21186266690003. The reversal of 21186266690000 is 9666268112.

It is a tau number, because it is divible by the number of its divisors (100).

It is a super-2 number, since 2×21186266690000² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21186266690003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 45827102 + ... + 46287101.

Almost surely, 2^{21186266690000} is an apocalyptic number.

21186266690000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21186266690000 is an abundant number, since it is smaller than the sum of its proper divisors (32337981143056).

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

21186266690000 is an equidigital number, since it uses as much as digits as its factorization.

21186266690000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92114254 (or 92114233 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 21186266690000 in words is "twenty-one trillion, one hundred eighty-six billion, two hundred sixty-six million, six hundred ninety thousand".