20089451538 has 24 divisors (see below), whose sum is σ = 46875387468. Its totient is φ = 6181369632.

The previous prime is 20089451527. The next prime is 20089451549. The reversal of 20089451538 is 83515498002.

20089451538 is a `hidden beast` number, since 20 + 0 + 8 + 94 + 5 + 1 + 538 = 666.

It is an interprime number because it is at equal distance from previous prime (20089451527) and next prime (20089451549).

It can be written as a sum of positive squares in 2 ways, for example, as 19435984569 + 653466969 = 139413^2 + 25563^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20089451493 and 20089451502.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42925945 + ... + 42926412.

Almost surely, 2^20089451538 is an apocalyptic number.

20089451538 is an abundant number, since it is smaller than the sum of its proper divisors (26785935930).

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

20089451538 is a wasteful number, since it uses less digits than its factorization.

20089451538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85852378 (or 85852375 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 20089451538 in words is "twenty billion, eighty-nine million, four hundred fifty-one thousand, five hundred thirty-eight".