21305464034 has 8 divisors (see below), whose sum is σ = 31966501980. Its totient is φ = 10649963376.

The previous prime is 21305464031. The next prime is 21305464073. The reversal of 21305464034 is 43046450312.

It can be written as a sum of positive squares in 2 ways, for example, as 20573599225 + 731864809 = 143435^2 + 27053^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21305464031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1374689 + ... + 1390100.

Almost surely, 2^21305464034 is an apocalyptic number.

21305464034 is a deficient number, since it is larger than the sum of its proper divisors (10661037946).

21305464034 is a wasteful number, since it uses less digits than its factorization.

21305464034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768644.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 21305464034 in words is "twenty-one billion, three hundred five million, four hundred sixty-four thousand, thirty-four".