20874556 has 6 divisors (see below), whose sum is σ = 36530480. Its totient is φ = 10437276.

The previous prime is 20874509. The next prime is 20874571. The reversal of 20874556 is 65547802.

It is a happy number.

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, 2609316 + ... + 2609323.

Almost surely, 2^20874556 is an apocalyptic number.

It is an amenable number.

20874556 is a deficient number, since it is larger than the sum of its proper divisors (15655924).

20874556 is a wasteful number, since it uses less digits than its factorization.

20874556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218643 (or 5218641 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 20874556 is about 4568.8681311677. The cubic root of 20874556 is about 275.3419701666.

The spelling of 20874556 in words is "twenty million, eight hundred seventy-four thousand, five hundred fifty-six".