20542406634 has 48 divisors (see below), whose sum is σ = 45426824352. Its totient is φ = 6706643424.

The previous prime is 20542406611. The next prime is 20542406639. The reversal of 20542406634 is 43660424502.

20542406634 is a `hidden beast` number, since 20 + 542 + 4 + 0 + 66 + 34 = 666.

It is not an unprimeable number, because it can be changed into a prime (20542406639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 541657 + ... + 578339.

It is an arithmetic number, because the mean of its divisors is an integer number (946392174).

Almost surely, 2^20542406634 is an apocalyptic number.

20542406634 is an abundant number, since it is smaller than the sum of its proper divisors (24884417718).

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

20542406634 is a wasteful number, since it uses less digits than its factorization.

20542406634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37331 (or 37328 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The spelling of 20542406634 in words is "twenty billion, five hundred forty-two million, four hundred six thousand, six hundred thirty-four".