20186155742 has 16 divisors (see below), whose sum is σ = 32842327392. Its totient is φ = 9267674880.

The previous prime is 20186155723. The next prime is 20186155757. The reversal of 20186155742 is 24755168102.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 20186155742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7238978 + ... + 7241765.

It is an arithmetic number, because the mean of its divisors is an integer number (2052645462).

Almost surely, 2^20186155742 is an apocalyptic number.

20186155742 is a deficient number, since it is larger than the sum of its proper divisors (12656171650).

20186155742 is a wasteful number, since it uses less digits than its factorization.

20186155742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14480803.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 20186155742 in words is "twenty billion, one hundred eighty-six million, one hundred fifty-five thousand, seven hundred forty-two".