20434664405 has 8 divisors (see below), whose sum is σ = 24529159584. Its totient is φ = 16342690000.

The previous prime is 20434664339. The next prime is 20434664539. The reversal of 20434664405 is 50446643402.

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

It is not a de Polignac number, because 20434664405 - 2⁸ = 20434664149 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 612311 + ... + 644820.

It is an arithmetic number, because the mean of its divisors is an integer number (3066144948).

Almost surely, 2^20434664405 is an apocalyptic number.

It is an amenable number.

20434664405 is a deficient number, since it is larger than the sum of its proper divisors (4094495179).

20434664405 is a wasteful number, since it uses less digits than its factorization.

20434664405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260387.

The product of its (nonzero) digits is 276480, while the sum is 38.

The spelling of 20434664405 in words is "twenty billion, four hundred thirty-four million, six hundred sixty-four thousand, four hundred five".