20772276 has 36 divisors (see below), whose sum is σ = 56383488. Its totient is φ = 5934768.

The previous prime is 20772251. The next prime is 20772293. The reversal of 20772276 is 67227702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17076 + ... + 18251.

It is an arithmetic number, because the mean of its divisors is an integer number (1566208).

Almost surely, 2^20772276 is an apocalyptic number.

It is an amenable number.

20772276 is an abundant number, since it is smaller than the sum of its proper divisors (35611212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20772276 is a wasteful number, since it uses less digits than its factorization.

20772276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35348 (or 35339 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 20772276 is about 4557.6612423479. The cubic root of 20772276 is about 274.8915318782.

Adding to 20772276 its reverse (67227702), we get a palindrome (87999978).

The spelling of 20772276 in words is "twenty million, seven hundred seventy-two thousand, two hundred seventy-six".