20287612 has 6 divisors (see below), whose sum is σ = 35503328. Its totient is φ = 10143804.

The previous prime is 20287591. The next prime is 20287637. The reversal of 20287612 is 21678202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2535948 + ... + 2535955.

Almost surely, 2^20287612 is an apocalyptic number.

It is an amenable number.

20287612 is a deficient number, since it is larger than the sum of its proper divisors (15215716).

20287612 is a wasteful number, since it uses less digits than its factorization.

20287612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071907 (or 5071905 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20287612 is about 4504.1771723590. The cubic root of 20287612 is about 272.7367389711.

The spelling of 20287612 in words is "twenty million, two hundred eighty-seven thousand, six hundred twelve".