20525143553416 has 8 divisors (see below), whose sum is σ = 38484644162670. Its totient is φ = 10262571776704.

The previous prime is 20525143553407. The next prime is 20525143553437. The reversal of 20525143553416 is 61435534152502.

It can be written as a sum of positive squares in only one way, i.e., 16702375617316 + 3822767936100 = 4086854^2 + 1955190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282821472081 + ... + 1282821472096.

Almost surely, 2^{20525143553416} is an apocalyptic number.

It is an amenable number.

20525143553416 is a deficient number, since it is larger than the sum of its proper divisors (17959500609254).

20525143553416 is a wasteful number, since it uses less digits than its factorization.

20525143553416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565642944183 (or 2565642944179 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 46.

The spelling of 20525143553416 in words is "twenty trillion, five hundred twenty-five billion, one hundred forty-three million, five hundred fifty-three thousand, four hundred sixteen".