20674287 has 12 divisors (see below), whose sum is σ = 29904784. Its totient is φ = 13763520.

The previous prime is 20674273. The next prime is 20674307. The reversal of 20674287 is 78247602.

It is a de Polignac number, because none of the positive numbers 2^k-20674287 is a prime.

It is a super-2 number, since 2×20674287² = 854852285916738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20674207) 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, 8487 + ... + 10647.

Almost surely, 2^20674287 is an apocalyptic number.

20674287 is a deficient number, since it is larger than the sum of its proper divisors (9230497).

20674287 is a wasteful number, since it uses less digits than its factorization.

20674287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230 (or 3227 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 20674287 is about 4546.8986133407. The cubic root of 20674287 is about 274.4586020562.

The spelling of 20674287 in words is "twenty million, six hundred seventy-four thousand, two hundred eighty-seven".