20127591786 has 16 divisors (see below), whose sum is σ = 40261631904. Its totient is φ = 6708122544.

The previous prime is 20127591769. The next prime is 20127591791. The reversal of 20127591786 is 68719572102.

It is a super-2 number, since 2×20127591786² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227620 + ... + 303423.

It is an arithmetic number, because the mean of its divisors is an integer number (2516351994).

Almost surely, 2^20127591786 is an apocalyptic number.

20127591786 is an abundant number, since it is smaller than the sum of its proper divisors (20134040118).

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

20127591786 is a wasteful number, since it uses less digits than its factorization.

20127591786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537365.

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 20127591786 in words is "twenty billion, one hundred twenty-seven million, five hundred ninety-one thousand, seven hundred eighty-six".