20605125463 has 4 divisors (see below), whose sum is σ = 22190135128. Its totient is φ = 19020115800.

The previous prime is 20605125439. The next prime is 20605125473. The reversal of 20605125463 is 36452150602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20605125463 - 2¹³ = 20605117271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20605125413) 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, 792504813 + ... + 792504838.

It is an arithmetic number, because the mean of its divisors is an integer number (5547533782).

Almost surely, 2^20605125463 is an apocalyptic number.

20605125463 is a deficient number, since it is larger than the sum of its proper divisors (1585009665).

20605125463 is a wasteful number, since it uses less digits than its factorization.

20605125463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585009664.

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 20605125463 in words is "twenty billion, six hundred five million, one hundred twenty-five thousand, four hundred sixty-three".