20585189242 has 16 divisors (see below), whose sum is σ = 31741040520. Its totient is φ = 10005346368.

The previous prime is 20585189237. The next prime is 20585189257. The reversal of 20585189242 is 24298158502.

It can be written as a sum of positive squares in 4 ways, for example, as 18225270001 + 2359919241 = 135001^2 + 48579^2 .

It is a super-2 number, since 2×20585189242² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20585189192 and 20585189201.

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, 43353 + ... + 207484.

Almost surely, 2^20585189242 is an apocalyptic number.

20585189242 is a deficient number, since it is larger than the sum of its proper divisors (11155851278).

20585189242 is a wasteful number, since it uses less digits than its factorization.

20585189242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251985.

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 20585189242 in words is "twenty billion, five hundred eighty-five million, one hundred eighty-nine thousand, two hundred forty-two".