20507544134 has 16 divisors (see below), whose sum is σ = 38351771136. Its totient is φ = 7989952200.

The previous prime is 20507544107. The next prime is 20507544143. The reversal of 20507544134 is 43144570502.

It is a junction number, because it is equal to n+sod(n) for n = 20507544094 and 20507544103.

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, 66582782 + ... + 66583089.

It is an arithmetic number, because the mean of its divisors is an integer number (2396985696).

Almost surely, 2^20507544134 is an apocalyptic number.

20507544134 is a deficient number, since it is larger than the sum of its proper divisors (17844227002).

20507544134 is a wasteful number, since it uses less digits than its factorization.

20507544134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133165891.

The product of its (nonzero) digits is 67200, while the sum is 35.

The spelling of 20507544134 in words is "twenty billion, five hundred seven million, five hundred forty-four thousand, one hundred thirty-four".