20363135018 has 4 divisors (see below), whose sum is σ = 30544702530. Its totient is φ = 10181567508.

The previous prime is 20363135017. The next prime is 20363135033. The reversal of 20363135018 is 81053136302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81053136302 = 2 ⋅40526568151.

It can be written as a sum of positive squares in only one way, i.e., 10260271849 + 10102863169 = 101293^2 + 100513^2 .

It is a super-2 number, since 2×20363135018² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20363135017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5090783753 + ... + 5090783756.

Almost surely, 2^20363135018 is an apocalyptic number.

20363135018 is a deficient number, since it is larger than the sum of its proper divisors (10181567512).

20363135018 is a wasteful number, since it uses less digits than its factorization.

20363135018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10181567511.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 20363135018 in words is "twenty billion, three hundred sixty-three million, one hundred thirty-five thousand, eighteen".