20173864133825 has 12 divisors (see below), whose sum is σ = 26487096910380. Its totient is φ = 15189732994560.

The previous prime is 20173864133749. The next prime is 20173864133869. The reversal of 20173864133825 is 52833146837102.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1257697203841 + 18916166929984 = 1121471^2 + 4349272^2 .

It is not a de Polignac number, because 20173864133825 - 2¹⁴ = 20173864117441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23733957380 + ... + 23733958229.

It is an arithmetic number, because the mean of its divisors is an integer number (2207258075865).

Almost surely, 2^{20173864133825} is an apocalyptic number.

20173864133825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20173864133825 is a deficient number, since it is larger than the sum of its proper divisors (6313232776555).

20173864133825 is a wasteful number, since it uses less digits than its factorization.

20173864133825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47467915636 (or 47467915631 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 20173864133825 in words is "twenty trillion, one hundred seventy-three billion, eight hundred sixty-four million, one hundred thirty-three thousand, eight hundred twenty-five".