20772355 has 16 divisors (see below), whose sum is σ = 26156160. Its totient is φ = 15818112.

The previous prime is 20772341. The next prime is 20772359. The reversal of 20772355 is 55327702.

It is a cyclic number.

It is not a de Polignac number, because 20772355 - 2⁹ = 20771843 is a prime.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7501 + ... + 9889.

It is an arithmetic number, because the mean of its divisors is an integer number (1634760).

Almost surely, 2^20772355 is an apocalyptic number.

20772355 is a deficient number, since it is larger than the sum of its proper divisors (5383805).

20772355 is a wasteful number, since it uses less digits than its factorization.

20772355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 20772355 is about 4557.6699090654. The cubic root of 20772355 is about 274.8918803620.

The spelling of 20772355 in words is "twenty million, seven hundred seventy-two thousand, three hundred fifty-five".