21364166157375 has 64 divisors (see below), whose sum is σ = 36046280005632. Its totient is φ = 11235229804800.

The previous prime is 21364166157353. The next prime is 21364166157403. The reversal of 21364166157375 is 57375166146312.

It is not a de Polignac number, because 21364166157375 - 2⁷ = 21364166157247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 107840662 + ... + 108038588.

It is an arithmetic number, because the mean of its divisors is an integer number (563223125088).

Almost surely, 2^{21364166157375} is an apocalyptic number.

21364166157375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21364166157375 is a deficient number, since it is larger than the sum of its proper divisors (14682113848257).

21364166157375 is a wasteful number, since it uses less digits than its factorization.

21364166157375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201961 (or 201951 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 57.

The spelling of 21364166157375 in words is "twenty-one trillion, three hundred sixty-four billion, one hundred sixty-six million, one hundred fifty-seven thousand, three hundred seventy-five".