20542047774 has 16 divisors (see below), whose sum is σ = 41162656512. Its totient is φ = 6834255768.

The previous prime is 20542047749. The next prime is 20542047787. The reversal of 20542047774 is 47774024502.

20542047774 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 3269974 + ... + 3276249.

It is an arithmetic number, because the mean of its divisors is an integer number (2572666032).

Almost surely, 2^20542047774 is an apocalyptic number.

20542047774 is an abundant number, since it is smaller than the sum of its proper divisors (20620608738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20542047774 is a wasteful number, since it uses less digits than its factorization.

20542047774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6546751.

The product of its (nonzero) digits is 439040, while the sum is 42.

The spelling of 20542047774 in words is "twenty billion, five hundred forty-two million, forty-seven thousand, seven hundred seventy-four".