21045465463 has 16 divisors (see below), whose sum is σ = 24472972800. Its totient is φ = 17895833280.

The previous prime is 21045465461. The next prime is 21045465487. The reversal of 21045465463 is 36456454012.

It is a cyclic number.

It is not a de Polignac number, because 21045465463 - 2¹ = 21045465461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21045465461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620806 + ... + 653827.

It is an arithmetic number, because the mean of its divisors is an integer number (1529560800).

Almost surely, 2^21045465463 is an apocalyptic number.

21045465463 is a deficient number, since it is larger than the sum of its proper divisors (3427507337).

21045465463 is a wasteful number, since it uses less digits than its factorization.

21045465463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274742.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 21045465463 in words is "twenty-one billion, forty-five million, four hundred sixty-five thousand, four hundred sixty-three".