20311140142 has 8 divisors (see below), whose sum is σ = 31209800832. Its totient is φ = 9907873200.

The previous prime is 20311140137. The next prime is 20311140211. The reversal of 20311140142 is 24104111302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123848334 + ... + 123848497.

It is an arithmetic number, because the mean of its divisors is an integer number (3901225104).

Almost surely, 2^20311140142 is an apocalyptic number.

20311140142 is a deficient number, since it is larger than the sum of its proper divisors (10898660690).

20311140142 is a wasteful number, since it uses less digits than its factorization.

20311140142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247696874.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20311140142 its reverse (24104111302), we get a palindrome (44415251444).

It can be divided in two parts, 203111 and 40142, that added together give a triangular number (243253 = T₆₉₇).

The spelling of 20311140142 in words is "twenty billion, three hundred eleven million, one hundred forty thousand, one hundred forty-two".