21050445267 has 32 divisors (see below), whose sum is σ = 32275008000. Its totient is φ = 13543921440.

The previous prime is 21050445257. The next prime is 21050445271. The reversal of 21050445267 is 76254405012.

It is a happy number.

It is not a de Polignac number, because 21050445267 - 2⁷ = 21050445139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21050445257) 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 31 ways as a sum of consecutive naturals, for example, 2557084 + ... + 2565302.

It is an arithmetic number, because the mean of its divisors is an integer number (1008594000).

Almost surely, 2^21050445267 is an apocalyptic number.

21050445267 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21050445267 is a deficient number, since it is larger than the sum of its proper divisors (11224562733).

21050445267 is a wasteful number, since it uses less digits than its factorization.

21050445267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11528 (or 11522 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 21050445267 in words is "twenty-one billion, fifty million, four hundred forty-five thousand, two hundred sixty-seven".