20427117136 has 20 divisors (see below), whose sum is σ = 39723590464. Its totient is φ = 10175868000.

The previous prime is 20427117133. The next prime is 20427117143. The reversal of 20427117136 is 63171172402.

It is a super-2 number, since 2×20427117136² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20427117133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2351190 + ... + 2359861.

Almost surely, 2^20427117136 is an apocalyptic number.

It is an amenable number.

20427117136 is a deficient number, since it is larger than the sum of its proper divisors (19296473328).

20427117136 is a wasteful number, since it uses less digits than its factorization.

20427117136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711330 (or 4711324 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

Adding to 20427117136 its reverse (63171172402), we get a palindrome (83598289538).

The spelling of 20427117136 in words is "twenty billion, four hundred twenty-seven million, one hundred seventeen thousand, one hundred thirty-six".