20487366 has 24 divisors (see below), whose sum is σ = 44474040. Its totient is φ = 6816096.

The previous prime is 20487361. The next prime is 20487371. The reversal of 20487366 is 66378402.

It is an interprime number because it is at equal distance from previous prime (20487361) and next prime (20487371).

It is a self number, because there is not a number n which added to its sum of digits gives 20487366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487361) 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, 15250 + ... + 16538.

It is an arithmetic number, because the mean of its divisors is an integer number (1853085).

Almost surely, 2^20487366 is an apocalyptic number.

20487366 is an abundant number, since it is smaller than the sum of its proper divisors (23986674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20487366 is a wasteful number, since it uses less digits than its factorization.

20487366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 2177 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 20487366 is about 4526.2971621404. The cubic root of 20487366 is about 273.6289487939.

The spelling of 20487366 in words is "twenty million, four hundred eighty-seven thousand, three hundred sixty-six".