21423589317603 has 24 divisors (see below), whose sum is σ = 33760108854576. Its totient is φ = 12983329800000.

The previous prime is 21423589317589. The next prime is 21423589317629. The reversal of 21423589317603 is 30671398532412.

21423589317603 is a `hidden beast` number, since 2 + 1 + 4 + 23 + 5 + 8 + 9 + 3 + 1 + 7 + 603 = 666.

It is not a de Polignac number, because 21423589317603 - 2⁶ = 21423589317539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21423589317603.

It is not an unprimeable number, because it can be changed into a prime (21423589317203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3581148 + ... + 7461353.

It is an arithmetic number, because the mean of its divisors is an integer number (1406671202274).

It is a 1-persistent number, because it is pandigital, but 2⋅21423589317603 = 42847178635206 is not.

Almost surely, 2^{21423589317603} is an apocalyptic number.

21423589317603 is a deficient number, since it is larger than the sum of its proper divisors (12336519536973).

21423589317603 is a wasteful number, since it uses less digits than its factorization.

21423589317603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11062115 (or 11062112 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 21423589317603 in words is "twenty-one trillion, four hundred twenty-three billion, five hundred eighty-nine million, three hundred seventeen thousand, six hundred three".