20173825 has 12 divisors (see below), whose sum is σ = 28589440. Its totient is φ = 13833360.

The previous prime is 20173799. The next prime is 20173847. The reversal of 20173825 is 52837102.

20173825 = T₃₉₀ + T₃₉₁ + ... + T₅₆₄.

It is not a de Polignac number, because 20173825 - 2⁷ = 20173697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20173793 and 20173802.

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, 57465 + ... + 57814.

Almost surely, 2^20173825 is an apocalyptic number.

20173825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20173825 is a deficient number, since it is larger than the sum of its proper divisors (8415615).

20173825 is a wasteful number, since it uses less digits than its factorization.

20173825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115296 (or 115291 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 20173825 is about 4491.5281363919. The cubic root of 20173825 is about 272.2258837646.

The spelling of 20173825 in words is "twenty million, one hundred seventy-three thousand, eight hundred twenty-five".