20531414144 has 16 divisors (see below), whose sum is σ = 40902426870. Its totient is φ = 10265707008.

The previous prime is 20531414107. The next prime is 20531414179. The reversal of 20531414144 is 44141413502.

It can be written as a sum of positive squares in only one way, i.e., 19575367744 + 956046400 = 139912^2 + 30920^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80200709 + ... + 80200964.

Almost surely, 2^20531414144 is an apocalyptic number.

It is an amenable number.

20531414144 is a deficient number, since it is larger than the sum of its proper divisors (20371012726).

20531414144 is an equidigital number, since it uses as much as digits as its factorization.

20531414144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160401687 (or 160401675 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 20531414144 its reverse (44141413502), we get a palindrome (64672827646).

The spelling of 20531414144 in words is "twenty billion, five hundred thirty-one million, four hundred fourteen thousand, one hundred forty-four".