20674871 has 8 divisors (see below), whose sum is σ = 23872800. Its totient is φ = 17538048.

The previous prime is 20674867. The next prime is 20674919. The reversal of 20674871 is 17847602.

It is a happy number.

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 20674871 - 2² = 20674867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20674811) 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, 14546 + ... + 15903.

It is an arithmetic number, because the mean of its divisors is an integer number (2984100).

Almost surely, 2^20674871 is an apocalyptic number.

20674871 is a deficient number, since it is larger than the sum of its proper divisors (3197929).

20674871 is an equidigital number, since it uses as much as digits as its factorization.

20674871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30553.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 20674871 is about 4546.9628324850. The cubic root of 20674871 is about 274.4611863020.

The spelling of 20674871 in words is "twenty million, six hundred seventy-four thousand, eight hundred seventy-one".