21315465703 has 4 divisors (see below), whose sum is σ = 24360532240. Its totient is φ = 18270399168.

The previous prime is 21315465701. The next prime is 21315465757. The reversal of 21315465703 is 30756451312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21315465703 - 2¹ = 21315465701 is a prime.

It is a super-3 number, since 3×21315465703³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21315465701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1522533258 + ... + 1522533271.

It is an arithmetic number, because the mean of its divisors is an integer number (6090133060).

Almost surely, 2^21315465703 is an apocalyptic number.

21315465703 is a deficient number, since it is larger than the sum of its proper divisors (3045066537).

21315465703 is an equidigital number, since it uses as much as digits as its factorization.

21315465703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045066536.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 21315465703 in words is "twenty-one billion, three hundred fifteen million, four hundred sixty-five thousand, seven hundred three".