20973671 has 8 divisors (see below), whose sum is σ = 21267840. Its totient is φ = 20681568.

The previous prime is 20973653. The next prime is 20973679. The reversal of 20973671 is 17637902.

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

It is a cyclic number.

It is not a de Polignac number, because 20973671 - 2⁶ = 20973607 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 (20973679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34250 + ... + 34856.

It is an arithmetic number, because the mean of its divisors is an integer number (2658480).

Almost surely, 2^20973671 is an apocalyptic number.

20973671 is a deficient number, since it is larger than the sum of its proper divisors (294169).

20973671 is a wasteful number, since it uses less digits than its factorization.

20973671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 20973671 is about 4579.7020645452. The cubic root of 20973671 is about 275.7770682834. Note that the first 3 decimals are identical.

The spelling of 20973671 in words is "twenty million, nine hundred seventy-three thousand, six hundred seventy-one".