21103006465 has 8 divisors (see below), whose sum is σ = 25330580928. Its totient is φ = 16877756400.

The previous prime is 21103006459. The next prime is 21103006471. The reversal of 21103006465 is 56460030112.

It is an interprime number because it is at equal distance from previous prime (21103006459) and next prime (21103006471).

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

It is a de Polignac number, because none of the positive numbers 2^k-21103006465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561061 + ... + 597490.

It is an arithmetic number, because the mean of its divisors is an integer number (3166322616).

Almost surely, 2^21103006465 is an apocalyptic number.

It is an amenable number.

21103006465 is a deficient number, since it is larger than the sum of its proper divisors (4227574463).

21103006465 is a wasteful number, since it uses less digits than its factorization.

21103006465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162199.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 21103006465 its reverse (56460030112), we get a palindrome (77563036577).

The spelling of 21103006465 in words is "twenty-one billion, one hundred three million, six thousand, four hundred sixty-five".