20127162518 has 4 divisors (see below), whose sum is σ = 30190743780. Its totient is φ = 10063581258.

The previous prime is 20127162509. The next prime is 20127162541. The reversal of 20127162518 is 81526172102.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5031790628 + ... + 5031790631.

It is an arithmetic number, because the mean of its divisors is an integer number (7547685945).

Almost surely, 2^20127162518 is an apocalyptic number.

20127162518 is a deficient number, since it is larger than the sum of its proper divisors (10063581262).

20127162518 is a wasteful number, since it uses less digits than its factorization.

20127162518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10063581261.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 20127162518 in words is "twenty billion, one hundred twenty-seven million, one hundred sixty-two thousand, five hundred eighteen".