20473725 has 12 divisors (see below), whose sum is σ = 33850016. Its totient is φ = 10919280.

The previous prime is 20473723. The next prime is 20473751. The reversal of 20473725 is 52737402.

It is not a de Polignac number, because 20473725 - 2¹ = 20473723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20473692 and 20473701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473721) 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, 136417 + ... + 136566.

Almost surely, 2^20473725 is an apocalyptic number.

20473725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20473725 is a deficient number, since it is larger than the sum of its proper divisors (13376291).

20473725 is a wasteful number, since it uses less digits than its factorization.

20473725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272996 (or 272991 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 20473725 is about 4524.7900503780. The cubic root of 20473725 is about 273.5682056476.

The spelling of 20473725 in words is "twenty million, four hundred seventy-three thousand, seven hundred twenty-five".