20754721134 has 24 divisors (see below), whose sum is σ = 51392643120. Its totient is φ = 5929920288.

The previous prime is 20754721129. The next prime is 20754721139. The reversal of 20754721134 is 43112745702.

20754721134 is a `hidden beast` number, since 2 + 0 + 75 + 472 + 113 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (20754721129) and next prime (20754721139).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20754721139) 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 11 ways as a sum of consecutive naturals, for example, 82359879 + ... + 82360130.

It is an arithmetic number, because the mean of its divisors is an integer number (2141360130).

Almost surely, 2^20754721134 is an apocalyptic number.

20754721134 is an abundant number, since it is smaller than the sum of its proper divisors (30637921986).

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

20754721134 is a wasteful number, since it uses less digits than its factorization.

20754721134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164720024 (or 164720021 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The spelling of 20754721134 in words is "twenty billion, seven hundred fifty-four million, seven hundred twenty-one thousand, one hundred thirty-four".