20430504605 has 64 divisors (see below), whose sum is σ = 28950528000. Its totient is φ = 13553568000.

The previous prime is 20430504581. The next prime is 20430504629. The reversal of 20430504605 is 50640503402.

It is an interprime number because it is at equal distance from previous prime (20430504581) and next prime (20430504629).

It is not a de Polignac number, because 20430504605 - 2¹⁰ = 20430503581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40942646 + ... + 40943144.

It is an arithmetic number, because the mean of its divisors is an integer number (452352000).

Almost surely, 2^20430504605 is an apocalyptic number.

It is an amenable number.

20430504605 is a deficient number, since it is larger than the sum of its proper divisors (8520023395).

20430504605 is a wasteful number, since it uses less digits than its factorization.

20430504605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850.

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 20430504605 in words is "twenty billion, four hundred thirty million, five hundred four thousand, six hundred five".