20757671 has 12 divisors (see below), whose sum is σ = 24019800. Its totient is φ = 17875440.

The previous prime is 20757643. The next prime is 20757673. The reversal of 20757671 is 17675702.

It is a de Polignac number, because none of the positive numbers 2^k-20757671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20757673) 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, 2216 + ... + 6813.

It is an arithmetic number, because the mean of its divisors is an integer number (2001650).

Almost surely, 2^20757671 is an apocalyptic number.

20757671 is a deficient number, since it is larger than the sum of its proper divisors (3262129).

20757671 is a wasteful number, since it uses less digits than its factorization.

20757671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9070 (or 9059 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 20757671 is about 4556.0587134057. The cubic root of 20757671 is about 274.8270913049.

The spelling of 20757671 in words is "twenty million, seven hundred fifty-seven thousand, six hundred seventy-one".