20585474552 has 8 divisors (see below), whose sum is σ = 38597764800. Its totient is φ = 10292737272.

The previous prime is 20585474543. The next prime is 20585474557. The reversal of 20585474552 is 25547458502.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20585474497 and 20585474506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20585474557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1286592152 + ... + 1286592167.

It is an arithmetic number, because the mean of its divisors is an integer number (4824720600).

Almost surely, 2^20585474552 is an apocalyptic number.

It is an amenable number.

20585474552 is a deficient number, since it is larger than the sum of its proper divisors (18012290248).

20585474552 is a wasteful number, since it uses less digits than its factorization.

20585474552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573184325 (or 2573184321 counting only the distinct ones).

The product of its (nonzero) digits is 2240000, while the sum is 47.

The spelling of 20585474552 in words is "twenty billion, five hundred eighty-five million, four hundred seventy-four thousand, five hundred fifty-two".