21364434635 has 8 divisors (see below), whose sum is σ = 25638312480. Its totient is φ = 17090887104.

The previous prime is 21364434607. The next prime is 21364434659. The reversal of 21364434635 is 53643446312.

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 21364434635 - 2²⁰ = 21363386059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21364434592 and 21364434601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94079 + ... + 227111.

It is an arithmetic number, because the mean of its divisors is an integer number (3204789060).

Almost surely, 2^21364434635 is an apocalyptic number.

21364434635 is a deficient number, since it is larger than the sum of its proper divisors (4273877845).

21364434635 is a wasteful number, since it uses less digits than its factorization.

21364434635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165157.

The product of its digits is 622080, while the sum is 41.

The spelling of 21364434635 in words is "twenty-one billion, three hundred sixty-four million, four hundred thirty-four thousand, six hundred thirty-five".