20312551254144 has 64 divisors (see below), whose sum is σ = 53957318436000. Its totient is φ = 6770586365952.

The previous prime is 20312551254139. The next prime is 20312551254167. The reversal of 20312551254144 is 44145215521302.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 8953627 + ... + 10990565.

Almost surely, 2^{20312551254144} is an apocalyptic number.

20312551254144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20312551254144 is an abundant number, since it is smaller than the sum of its proper divisors (33644767181856).

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

20312551254144 is a wasteful number, since it uses less digits than its factorization.

20312551254144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062925 (or 2062913 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 39.

Adding to 20312551254144 its reverse (44145215521302), we get a palindrome (64457766775446).

The spelling of 20312551254144 in words is "twenty trillion, three hundred twelve billion, five hundred fifty-one million, two hundred fifty-four thousand, one hundred forty-four".