20559772 has 12 divisors (see below), whose sum is σ = 36026536. Its totient is φ = 10266480.

The previous prime is 20559757. The next prime is 20559787. The reversal of 20559772 is 27795502.

It is an interprime number because it is at equal distance from previous prime (20559757) and next prime (20559787).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622 + ... + 6442.

Almost surely, 2^20559772 is an apocalyptic number.

It is an amenable number.

20559772 is a deficient number, since it is larger than the sum of its proper divisors (15466764).

20559772 is a wasteful number, since it uses less digits than its factorization.

20559772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6708 (or 6706 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 20559772 is about 4534.2884778099. The cubic root of 20559772 is about 273.9509209340.

The spelling of 20559772 in words is "twenty million, five hundred fifty-nine thousand, seven hundred seventy-two".