20025508177785 has 48 divisors (see below), whose sum is σ = 35236640117952. Its totient is φ = 9704312661120.

The previous prime is 20025508177769. The next prime is 20025508177793. The reversal of 20025508177785 is 58777180552002.

It is not a de Polignac number, because 20025508177785 - 2⁴ = 20025508177769 is a prime.

It is a super-2 number, since 2×20025508177785² (a number of 27 digits) contains 22 as substring.

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 in 47 ways as a sum of consecutive naturals, for example, 654454 + ... + 6362336.

It is an arithmetic number, because the mean of its divisors is an integer number (734096669124).

Almost surely, 2^{20025508177785} is an apocalyptic number.

It is an amenable number.

20025508177785 is a deficient number, since it is larger than the sum of its proper divisors (15211131940167).

20025508177785 is a wasteful number, since it uses less digits than its factorization.

20025508177785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5709846 (or 5709835 counting only the distinct ones).

The product of its (nonzero) digits is 10976000, while the sum is 57.

The spelling of 20025508177785 in words is "twenty trillion, twenty-five billion, five hundred eight million, one hundred seventy-seven thousand, seven hundred eighty-five".