20158362538 has 16 divisors (see below), whose sum is σ = 30307079880. Its totient is φ = 10056024576.

The previous prime is 20158362517. The next prime is 20158362541. The reversal of 20158362538 is 83526385102.

It can be written as a sum of positive squares in 4 ways, for example, as 19477830969 + 680531569 = 139563^2 + 26087^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20158362494 and 20158362503.

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, 2402206 + ... + 2410582.

Almost surely, 2^20158362538 is an apocalyptic number.

20158362538 is a deficient number, since it is larger than the sum of its proper divisors (10148717342).

20158362538 is a wasteful number, since it uses less digits than its factorization.

20158362538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11001.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 20158362538 in words is "twenty billion, one hundred fifty-eight million, three hundred sixty-two thousand, five hundred thirty-eight".