20695671 has 6 divisors (see below), whose sum is σ = 29893760. Its totient is φ = 13797108.

The previous prime is 20695669. The next prime is 20695679. The reversal of 20695671 is 17659602.

It is not a de Polignac number, because 20695671 - 2¹ = 20695669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20695679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1149751 + ... + 1149768.

Almost surely, 2^20695671 is an apocalyptic number.

20695671 is a deficient number, since it is larger than the sum of its proper divisors (9198089).

20695671 is a wasteful number, since it uses less digits than its factorization.

20695671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299525 (or 2299522 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 20695671 is about 4549.2494985437. The cubic root of 20695671 is about 274.5531962158.

The spelling of 20695671 in words is "twenty million, six hundred ninety-five thousand, six hundred seventy-one".