20725075 has 12 divisors (see below), whose sum is σ = 29370640. Its totient is φ = 14211360.

The previous prime is 20725051. The next prime is 20725123. The reversal of 20725075 is 57052702.

It is not a de Polignac number, because 20725075 - 2⁹ = 20724563 is a prime.

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, 59040 + ... + 59389.

Almost surely, 2^20725075 is an apocalyptic number.

20725075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20725075 is a deficient number, since it is larger than the sum of its proper divisors (8645565).

20725075 is a wasteful number, since it uses less digits than its factorization.

20725075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118446 (or 118441 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 20725075 is about 4552.4800933118. The cubic root of 20725075 is about 274.6831612681.

Adding to 20725075 its reverse (57052702), we get a palindrome (77777777).

The spelling of 20725075 in words is "twenty million, seven hundred twenty-five thousand, seventy-five".