21152010115450 has 24 divisors (see below), whose sum is σ = 40611859424640. Its totient is φ = 8187874882800.

The previous prime is 21152010115417. The next prime is 21152010115451. The reversal of 21152010115450 is 5451101025112.

It is not an unprimeable number, because it can be changed into a prime (21152010115451) 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 11 ways as a sum of consecutive naturals, for example, 6823227520 + ... + 6823230619.

It is an arithmetic number, because the mean of its divisors is an integer number (1692160809360).

Almost surely, 2^{21152010115450} is an apocalyptic number.

21152010115450 is a deficient number, since it is larger than the sum of its proper divisors (19459849309190).

21152010115450 is a wasteful number, since it uses less digits than its factorization.

21152010115450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13646458182 (or 13646458177 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 28.

The spelling of 21152010115450 in words is "twenty-one trillion, one hundred fifty-two billion, ten million, one hundred fifteen thousand, four hundred fifty".