21500141342555 has 8 divisors (see below), whose sum is σ = 25800213936672. Its totient is φ = 17200083523648.

The previous prime is 21500141342509. The next prime is 21500141342567. The reversal of 21500141342555 is 55524314100512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21500141342555 - 2²⁶ = 21500074233691 is a prime.

It is a Duffinian 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, 190394 + ... + 6560223.

It is an arithmetic number, because the mean of its divisors is an integer number (3225026742084).

Almost surely, 2^{21500141342555} is an apocalyptic number.

21500141342555 is a deficient number, since it is larger than the sum of its proper divisors (4300072594117).

21500141342555 is an equidigital number, since it uses as much as digits as its factorization.

21500141342555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7387605.

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 21500141342555 in words is "twenty-one trillion, five hundred billion, one hundred forty-one million, three hundred forty-two thousand, five hundred fifty-five".