21041635434434 has 8 divisors (see below), whose sum is σ = 31582069348620. Its totient is φ = 10514278984896.

The previous prime is 21041635434293. The next prime is 21041635434541. The reversal of 21041635434434 is 43443453614012.

It can be written as a sum of positive squares in 2 ways, for example, as 12921113214025 + 8120522220409 = 3594595^2 + 2849653^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3269362139 + ... + 3269368574.

Almost surely, 2^{21041635434434} is an apocalyptic number.

21041635434434 is a deficient number, since it is larger than the sum of its proper divisors (10540433914186).

21041635434434 is a wasteful number, since it uses less digits than its factorization.

21041635434434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6538732324.

The product of its (nonzero) digits is 1658880, while the sum is 44.

The spelling of 21041635434434 in words is "twenty-one trillion, forty-one billion, six hundred thirty-five million, four hundred thirty-four thousand, four hundred thirty-four".