20772265 has 8 divisors (see below), whose sum is σ = 25786440. Its totient is φ = 16044672.

The previous prime is 20772251. The next prime is 20772293. The reversal of 20772265 is 56227702.

It can be written as a sum of positive squares in 4 ways, for example, as 15129 + 20757136 = 123^2 + 4556^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20772265 - 2⁵ = 20772233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71484 + ... + 71773.

It is an arithmetic number, because the mean of its divisors is an integer number (3223305).

Almost surely, 2^20772265 is an apocalyptic number.

It is an amenable number.

20772265 is a deficient number, since it is larger than the sum of its proper divisors (5014175).

20772265 is a wasteful number, since it uses less digits than its factorization.

20772265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143291.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20772265 is about 4557.6600355884. The cubic root of 20772265 is about 274.8914833551.

Adding to 20772265 its reverse (56227702), we get a palindrome (76999967).

The spelling of 20772265 in words is "twenty million, seven hundred seventy-two thousand, two hundred sixty-five".