21302461004464 has 20 divisors (see below), whose sum is σ = 41480922816400. Its totient is φ = 10597706729280.

The previous prime is 21302461004459. The next prime is 21302461004509. The reversal of 21302461004464 is 46440016420312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3345232527 + ... + 3345238894.

It is an arithmetic number, because the mean of its divisors is an integer number (2074046140820).

Almost surely, 2^{21302461004464} is an apocalyptic number.

It is an amenable number.

21302461004464 is a deficient number, since it is larger than the sum of its proper divisors (20178461811936).

21302461004464 is a wasteful number, since it uses less digits than its factorization.

21302461004464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6690471628 (or 6690471622 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 37.

Adding to 21302461004464 its reverse (46440016420312), we get a palindrome (67742477424776).

The spelling of 21302461004464 in words is "twenty-one trillion, three hundred two billion, four hundred sixty-one million, four thousand, four hundred sixty-four".