20525432521255 has 16 divisors (see below), whose sum is σ = 24639321934080. Its totient is φ = 16414478000128.

The previous prime is 20525432521229. The next prime is 20525432521301. The reversal of 20525432521255 is 55212523452502.

It is a cyclic number.

It is not a de Polignac number, because 20525432521255 - 2¹⁹ = 20525431996967 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564130794 + ... + 564167176.

It is an arithmetic number, because the mean of its divisors is an integer number (1539957620880).

Almost surely, 2^{20525432521255} is an apocalyptic number.

20525432521255 is a deficient number, since it is larger than the sum of its proper divisors (4113889412825).

20525432521255 is a wasteful number, since it uses less digits than its factorization.

20525432521255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73610.

The product of its (nonzero) digits is 1200000, while the sum is 43.

Adding to 20525432521255 its reverse (55212523452502), we get a palindrome (75737955973757).

The spelling of 20525432521255 in words is "twenty trillion, five hundred twenty-five billion, four hundred thirty-two million, five hundred twenty-one thousand, two hundred fifty-five".