21603145188147 has 8 divisors (see below), whose sum is σ = 28895058549456. Its totient is φ = 14356664309472.

The previous prime is 21603145188083. The next prime is 21603145188167. The reversal of 21603145188147 is 74188154130612.

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

It is not a de Polignac number, because 21603145188147 - 2⁶ = 21603145188083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21603145188147.

It is not an unprimeable number, because it can be changed into a prime (21603145188167) 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, 11358119548 + ... + 11358121449.

It is an arithmetic number, because the mean of its divisors is an integer number (3611882318682).

Almost surely, 2^{21603145188147} is an apocalyptic number.

21603145188147 is a deficient number, since it is larger than the sum of its proper divisors (7291913361309).

21603145188147 is a wasteful number, since it uses less digits than its factorization.

21603145188147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22716241317.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 21603145188147 in words is "twenty-one trillion, six hundred three billion, one hundred forty-five million, one hundred eighty-eight thousand, one hundred forty-seven".