21150036166643 has 8 divisors (see below), whose sum is σ = 21946712933376. Its totient is φ = 20367214648200.

The previous prime is 21150036166543. The next prime is 21150036166657. The reversal of 21150036166643 is 34666163005112.

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 21150036166643 - 2¹² = 21150036162547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21150036166594 and 21150036166603.

It is not an unprimeable number, because it can be changed into a prime (21150036166543) 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, 3463808963 + ... + 3463815068.

It is an arithmetic number, because the mean of its divisors is an integer number (2743339116672).

Almost surely, 2^{21150036166643} is an apocalyptic number.

21150036166643 is a deficient number, since it is larger than the sum of its proper divisors (796676766733).

21150036166643 is an equidigital number, since it uses as much as digits as its factorization.

21150036166643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6927624145.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 21150036166643 in words is "twenty-one trillion, one hundred fifty billion, thirty-six million, one hundred sixty-six thousand, six hundred forty-three".