21145306463 has 8 divisors (see below), whose sum is σ = 21466330032. Its totient is φ = 20824442496.

The previous prime is 21145306447. The next prime is 21145306577. The reversal of 21145306463 is 36460354112.

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 21145306463 - 2⁴ = 21145306447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21145336463) 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, 242081 + ... + 317637.

It is an arithmetic number, because the mean of its divisors is an integer number (2683291254).

Almost surely, 2^21145306463 is an apocalyptic number.

21145306463 is a deficient number, since it is larger than the sum of its proper divisors (321023569).

21145306463 is an equidigital number, since it uses as much as digits as its factorization.

21145306463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79801.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 21145306463 in words is "twenty-one billion, one hundred forty-five million, three hundred six thousand, four hundred sixty-three".