20622556 has 6 divisors (see below), whose sum is σ = 36089480. Its totient is φ = 10311276.

The previous prime is 20622529. The next prime is 20622583. The reversal of 20622556 is 65522602.

It is an interprime number because it is at equal distance from previous prime (20622529) and next prime (20622583).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2577816 + ... + 2577823.

Almost surely, 2^20622556 is an apocalyptic number.

It is an amenable number.

20622556 is a deficient number, since it is larger than the sum of its proper divisors (15466924).

20622556 is a wasteful number, since it uses less digits than its factorization.

20622556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155643 (or 5155641 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 20622556 is about 4541.2064476304. The cubic root of 20622556 is about 274.2294949778.

The spelling of 20622556 in words is "twenty million, six hundred twenty-two thousand, five hundred fifty-six".