20311211140144 has 40 divisors (see below), whose sum is σ = 41067108322560. Its totient is φ = 9713315185728.

The previous prime is 20311211140009. The next prime is 20311211140201. The reversal of 20311211140144 is 44104111211302.

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, 2728447 + ... + 6933025.

It is an arithmetic number, because the mean of its divisors is an integer number (1026677708064).

Almost surely, 2^{20311211140144} is an apocalyptic number.

It is an amenable number.

20311211140144 is an abundant number, since it is smaller than the sum of its proper divisors (20755897182416).

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

20311211140144 is a wasteful number, since it uses less digits than its factorization.

20311211140144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217737 (or 4217731 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 20311211140144 its reverse (44104111211302), we get a palindrome (64415322351446).

The spelling of 20311211140144 in words is "twenty trillion, three hundred eleven billion, two hundred eleven million, one hundred forty thousand, one hundred forty-four".