20387650 has 24 divisors (see below), whose sum is σ = 38461824. Its totient is φ = 8038800.

The previous prime is 20387623. The next prime is 20387651. The reversal of 20387650 is 5678302.

It is not an unprimeable number, because it can be changed into a prime (20387651) 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, 679 + ... + 6421.

It is an arithmetic number, because the mean of its divisors is an integer number (1602576).

Almost surely, 2^20387650 is an apocalyptic number.

20387650 is a deficient number, since it is larger than the sum of its proper divisors (18074174).

20387650 is a wasteful number, since it uses less digits than its factorization.

20387650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5826 (or 5821 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20387650 is about 4515.2685412941. The cubic root of 20387650 is about 273.1842914738.

The spelling of 20387650 in words is "twenty million, three hundred eighty-seven thousand, six hundred fifty".