20641675 has 12 divisors (see below), whose sum is σ = 25679160. Its totient is φ = 16459520.

The previous prime is 20641669. The next prime is 20641679. The reversal of 20641675 is 57614602.

It is a happy number.

It is not a de Polignac number, because 20641675 - 2²¹ = 18544523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20641679) 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, 7656 + ... + 9994.

It is an arithmetic number, because the mean of its divisors is an integer number (2139930).

Almost surely, 2^20641675 is an apocalyptic number.

20641675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20641675 is a deficient number, since it is larger than the sum of its proper divisors (5037485).

20641675 is a wasteful number, since it uses less digits than its factorization.

20641675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702 (or 2697 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20641675 is about 4543.3110173089. The cubic root of 20641675 is about 274.3142140964.

It can be divided in two parts, 20641 and 675, that added together give a square (21316 = 146²).

The spelling of 20641675 in words is "twenty million, six hundred forty-one thousand, six hundred seventy-five".