20219265 has 24 divisors (see below), whose sum is σ = 38233728. Its totient is φ = 9803040.

The previous prime is 20219263. The next prime is 20219281. The reversal of 20219265 is 56291202.

It is not a de Polignac number, because 20219265 - 2¹ = 20219263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20219263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19929 + ... + 20918.

It is an arithmetic number, because the mean of its divisors is an integer number (1593072).

Almost surely, 2^20219265 is an apocalyptic number.

It is an amenable number.

20219265 is a deficient number, since it is larger than the sum of its proper divisors (18014463).

20219265 is a wasteful number, since it uses less digits than its factorization.

20219265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40869 (or 40866 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20219265 is about 4496.5837032129. The cubic root of 20219265 is about 272.4301198364.

The spelling of 20219265 in words is "twenty million, two hundred nineteen thousand, two hundred sixty-five".