21154543614043 has 8 divisors (see below), whose sum is σ = 24176661313280. Its totient is φ = 18132435924840.

The previous prime is 21154543613969. The next prime is 21154543614091. The reversal of 21154543614043 is 34041634545112.

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 21154543614043 - 2¹³ = 21154543605851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21154543654043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2765338 + ... + 7067968.

It is an arithmetic number, because the mean of its divisors is an integer number (3022082664160).

Almost surely, 2^{21154543614043} is an apocalyptic number.

21154543614043 is a deficient number, since it is larger than the sum of its proper divisors (3022117699237).

21154543614043 is an equidigital number, since it uses as much as digits as its factorization.

21154543614043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005017.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 21154543614043 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred forty-three million, six hundred fourteen thousand, forty-three".