20487004 has 6 divisors (see below), whose sum is σ = 35852264. Its totient is φ = 10243500.

The previous prime is 20486957. The next prime is 20487029. The reversal of 20487004 is 40078402.

It is a self number, because there is not a number n which added to its sum of digits gives 20487004.

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 as a sum of consecutive naturals, namely, 2560872 + ... + 2560879.

Almost surely, 2^20487004 is an apocalyptic number.

It is an amenable number.

20487004 is a deficient number, since it is larger than the sum of its proper divisors (15365260).

20487004 is a wasteful number, since it uses less digits than its factorization.

20487004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5121755 (or 5121753 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20487004 is about 4526.2571734271. The cubic root of 20487004 is about 273.6273371622.

The spelling of 20487004 in words is "twenty million, four hundred eighty-seven thousand, four".