20536044381 has 12 divisors (see below), whose sum is σ = 29674001500. Its totient is φ = 13685699520.

The previous prime is 20536044377. The next prime is 20536044383. The reversal of 20536044381 is 18344063502.

20536044381 is a `hidden beast` number, since 2 + 0 + 5 + 3 + 604 + 43 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10147338756 + 10388705625 = 100734^2 + 101925^2 .

It is not a de Polignac number, because 20536044381 - 2² = 20536044377 is a prime.

It is a super-2 number, since 2×20536044381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20536044383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 390280 + ... + 439761.

Almost surely, 2^20536044381 is an apocalyptic number.

It is an amenable number.

20536044381 is a deficient number, since it is larger than the sum of its proper divisors (9137957119).

20536044381 is a wasteful number, since it uses less digits than its factorization.

20536044381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832796 (or 832793 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 20536044381 in words is "twenty billion, five hundred thirty-six million, forty-four thousand, three hundred eighty-one".