21375171265344 has 56 divisors (see below), whose sum is σ = 60905536080480. Its totient is φ = 6576975773184.

The previous prime is 21375171265307. The next prime is 21375171265381. The reversal of 21375171265344 is 44356217157312.

It is an interprime number because it is at equal distance from previous prime (21375171265307) and next prime (21375171265381).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4281882774 + ... + 4281887765.

It is an arithmetic number, because the mean of its divisors is an integer number (1087598858580).

Almost surely, 2^{21375171265344} is an apocalyptic number.

21375171265344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21375171265344 is an abundant number, since it is smaller than the sum of its proper divisors (39530364815136).

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

21375171265344 is a wasteful number, since it uses less digits than its factorization.

21375171265344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8563770567 (or 8563770557 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 51.

The spelling of 21375171265344 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred seventy-one million, two hundred sixty-five thousand, three hundred forty-four".