20413725 has 12 divisors (see below), whose sum is σ = 33750816. Its totient is φ = 10887280.

The previous prime is 20413703. The next prime is 20413739. The reversal of 20413725 is 52731402.

It is not a de Polignac number, because 20413725 - 2⁷ = 20413597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20413695 and 20413704.

It is a congruent number.

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, 136017 + ... + 136166.

It is an arithmetic number, because the mean of its divisors is an integer number (2812568).

Almost surely, 2^20413725 is an apocalyptic number.

20413725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20413725 is a deficient number, since it is larger than the sum of its proper divisors (13337091).

20413725 is a wasteful number, since it uses less digits than its factorization.

20413725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272196 (or 272191 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20413725 is about 4518.1550438204. The cubic root of 20413725 is about 273.3007058351.

The spelling of 20413725 in words is "twenty million, four hundred thirteen thousand, seven hundred twenty-five".