20772356 has 48 divisors (see below), whose sum is σ = 41620992. Its totient is φ = 8985600.

The previous prime is 20772341. The next prime is 20772359. The reversal of 20772356 is 65327702.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20772359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132230 + ... + 132386.

It is an arithmetic number, because the mean of its divisors is an integer number (867104).

Almost surely, 2^20772356 is an apocalyptic number.

It is an amenable number.

20772356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20772356 is a wasteful number, since it uses less digits than its factorization.

20772356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 20772356 is about 4557.6700187706. The cubic root of 20772356 is about 274.8918847732.

The spelling of 20772356 in words is "twenty million, seven hundred seventy-two thousand, three hundred fifty-six".