20287250 has 32 divisors (see below), whose sum is σ = 39985920. Its totient is φ = 7686000.

The previous prime is 20287249. The next prime is 20287261. The reversal of 20287250 is 5278202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2615 + ... + 6885.

It is an arithmetic number, because the mean of its divisors is an integer number (1249560).

Almost surely, 2^20287250 is an apocalyptic number.

20287250 is a deficient number, since it is larger than the sum of its proper divisors (19698670).

20287250 is a wasteful number, since it uses less digits than its factorization.

20287250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307 (or 4297 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 20287250 is about 4504.1369872596. The cubic root of 20287250 is about 272.7351167778.

The spelling of 20287250 in words is "twenty million, two hundred eighty-seven thousand, two hundred fifty".