20487950 has 24 divisors (see below), whose sum is σ = 43552272. Its totient is φ = 7024320.

The previous prime is 20487937. The next prime is 20487977. The reversal of 20487950 is 5978402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 20487950.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28919 + ... + 29618.

It is an arithmetic number, because the mean of its divisors is an integer number (1814678).

Almost surely, 2^20487950 is an apocalyptic number.

20487950 is an abundant number, since it is smaller than the sum of its proper divisors (23064322).

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

20487950 is a wasteful number, since it uses less digits than its factorization.

20487950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58556 (or 58551 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20487950 is about 4526.3616735740. The cubic root of 20487950 is about 273.6315487342.

The spelling of 20487950 in words is "twenty million, four hundred eighty-seven thousand, nine hundred fifty".