20725265 has 8 divisors (see below), whose sum is σ = 27131328. Its totient is φ = 15072880.

The previous prime is 20725249. The next prime is 20725273. The reversal of 20725265 is 56252702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20725265 - 2⁴ = 20725249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188357 + ... + 188466.

It is an arithmetic number, because the mean of its divisors is an integer number (3391416).

Almost surely, 2^20725265 is an apocalyptic number.

It is an amenable number.

20725265 is a deficient number, since it is larger than the sum of its proper divisors (6406063).

20725265 is a wasteful number, since it uses less digits than its factorization.

20725265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376839.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20725265 is about 4552.5009610103. The cubic root of 20725265 is about 274.6840006642.

Adding to 20725265 its reverse (56252702), we get a palindrome (76977967).

It can be divided in two parts, 2072 and 5265, that added together give a palindrome (7337).

The spelling of 20725265 in words is "twenty million, seven hundred twenty-five thousand, two hundred sixty-five".