21313745603 has 8 divisors (see below), whose sum is σ = 21803476800. Its totient is φ = 20825524800.

The previous prime is 21313745569. The next prime is 21313745617. The reversal of 21313745603 is 30654731312.

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 21313745603 - 2⁸ = 21313745347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313745633) 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, 349028 + ... + 405521.

It is an arithmetic number, because the mean of its divisors is an integer number (2725434600).

Almost surely, 2^21313745603 is an apocalyptic number.

21313745603 is a deficient number, since it is larger than the sum of its proper divisors (489731197).

21313745603 is an equidigital number, since it uses as much as digits as its factorization.

21313745603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755197.

The product of its (nonzero) digits is 45360, while the sum is 35.

The spelling of 21313745603 in words is "twenty-one billion, three hundred thirteen million, seven hundred forty-five thousand, six hundred three".