20131534144 has 14 divisors (see below), whose sum is σ = 39948513194. Its totient is φ = 10065767040.

The previous prime is 20131534103. The next prime is 20131534169. The reversal of 20131534144 is 44143513102.

It can be written as a sum of positive squares in only one way, i.e., 17838273600 + 2293260544 = 133560^2 + 47888^2 .

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 as a sum of consecutive naturals, namely, 157277547 + ... + 157277674.

Almost surely, 2^20131534144 is an apocalyptic number.

It is an amenable number.

20131534144 is a deficient number, since it is larger than the sum of its proper divisors (19816979050).

20131534144 is an equidigital number, since it uses as much as digits as its factorization.

20131534144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314555233 (or 314555223 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 20131534144 in words is "twenty billion, one hundred thirty-one million, five hundred thirty-four thousand, one hundred forty-four".