20125053521 has 8 divisors (see below), whose sum is σ = 21116082624. Its totient is φ = 19143693360.

The previous prime is 20125053503. The next prime is 20125053541. The reversal of 20125053521 is 12535052102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20125053521 - 2¹⁴ = 20125037137 is a prime.

It is a super-2 number, since 2×20125053521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20125053541) by changing a digit.

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, 2412971 + ... + 2421296.

It is an arithmetic number, because the mean of its divisors is an integer number (2639510328).

Almost surely, 2^20125053521 is an apocalyptic number.

It is an amenable number.

20125053521 is a deficient number, since it is larger than the sum of its proper divisors (991029103).

20125053521 is a wasteful number, since it uses less digits than its factorization.

20125053521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4834471.

The product of its (nonzero) digits is 3000, while the sum is 26.

The spelling of 20125053521 in words is "twenty billion, one hundred twenty-five million, fifty-three thousand, five hundred twenty-one".