20525644061 has 16 divisors (see below), whose sum is σ = 23079987840. Its totient is φ = 18111677760.

The previous prime is 20525644039. The next prime is 20525644063. The reversal of 20525644061 is 16044652502.

It is a cyclic number.

It is not a de Polignac number, because 20525644061 - 2⁶ = 20525643997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525644063) 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 15 ways as a sum of consecutive naturals, for example, 478466 + ... + 519596.

It is an arithmetic number, because the mean of its divisors is an integer number (1442499240).

Almost surely, 2^20525644061 is an apocalyptic number.

It is an amenable number.

20525644061 is a deficient number, since it is larger than the sum of its proper divisors (2554343779).

20525644061 is a wasteful number, since it uses less digits than its factorization.

20525644061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42836.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 20525644061 in words is "twenty billion, five hundred twenty-five million, six hundred forty-four thousand, sixty-one".