21464606535 has 16 divisors (see below), whose sum is σ = 34345283040. Its totient is φ = 11447152640.

The previous prime is 21464606531. The next prime is 21464606561. The reversal of 21464606535 is 53560646412.

It is not a de Polignac number, because 21464606535 - 2² = 21464606531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21464606531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383755 + ... + 436115.

It is an arithmetic number, because the mean of its divisors is an integer number (2146580190).

Almost surely, 2^21464606535 is an apocalyptic number.

21464606535 is a deficient number, since it is larger than the sum of its proper divisors (12880676505).

21464606535 is a wasteful number, since it uses less digits than its factorization.

21464606535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79698.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 21464606535 in words is "twenty-one billion, four hundred sixty-four million, six hundred six thousand, five hundred thirty-five".