21603151704643 has 8 divisors (see below), whose sum is σ = 21610031717120. Its totient is φ = 21596272193160.

The previous prime is 21603151704619. The next prime is 21603151704677. The reversal of 21603151704643 is 34640715130612.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21603151704643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21603151704643.

It is not an unprimeable number, because it can be changed into a prime (21603151704143) 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, 98256688 + ... + 98476306.

It is an arithmetic number, because the mean of its divisors is an integer number (2701253964640).

Almost surely, 2^{21603151704643} is an apocalyptic number.

21603151704643 is a deficient number, since it is larger than the sum of its proper divisors (6880012477).

21603151704643 is a wasteful number, since it uses less digits than its factorization.

21603151704643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250497.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 21603151704643 in words is "twenty-one trillion, six hundred three billion, one hundred fifty-one million, seven hundred four thousand, six hundred forty-three".