20358725 has 12 divisors (see below), whose sum is σ = 26116260. Its totient is φ = 15724800.

The previous prime is 20358721. The next prime is 20358733. The reversal of 20358725 is 52785302.

It can be written as a sum of positive squares in 6 ways, for example, as 1366561 + 18992164 = 1169^2 + 4358^2 .

It is not a de Polignac number, because 20358725 - 2² = 20358721 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20358691 and 20358700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20358721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13316 + ... + 14765.

It is an arithmetic number, because the mean of its divisors is an integer number (2176355).

Almost surely, 2^20358725 is an apocalyptic number.

20358725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20358725 is a deficient number, since it is larger than the sum of its proper divisors (5757535).

20358725 is a wasteful number, since it uses less digits than its factorization.

20358725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28120 (or 28115 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 20358725 is about 4512.0643834059. The cubic root of 20358725 is about 273.0550368270.

The spelling of 20358725 in words is "twenty million, three hundred fifty-eight thousand, seven hundred twenty-five".