20952556 has 6 divisors (see below), whose sum is σ = 36666980. Its totient is φ = 10476276.

The previous prime is 20952541. The next prime is 20952577. The reversal of 20952556 is 65525902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2619066 + ... + 2619073.

Almost surely, 2^20952556 is an apocalyptic number.

It is an amenable number.

20952556 is a deficient number, since it is larger than the sum of its proper divisors (15714424).

20952556 is a wasteful number, since it uses less digits than its factorization.

20952556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5238143 (or 5238141 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 20952556 is about 4577.3962030831. The cubic root of 20952556 is about 275.6844920883.

It can be divided in two parts, 20 and 952556, that added together give a square (952576 = 976²).

The spelling of 20952556 in words is "twenty million, nine hundred fifty-two thousand, five hundred fifty-six".