20249273 has 4 divisors (see below), whose sum is σ = 22090128. Its totient is φ = 18408420.

The previous prime is 20249267. The next prime is 20249291. The reversal of 20249273 is 37294202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20249273 - 2¹² = 20245177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20249263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920411 + ... + 920432.

It is an arithmetic number, because the mean of its divisors is an integer number (5522532).

Almost surely, 2^20249273 is an apocalyptic number.

It is an amenable number.

20249273 is a deficient number, since it is larger than the sum of its proper divisors (1840855).

20249273 is a wasteful number, since it uses less digits than its factorization.

20249273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840854.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20249273 is about 4499.9192214972. The cubic root of 20249273 is about 272.5648270422.

The spelling of 20249273 in words is "twenty million, two hundred forty-nine thousand, two hundred seventy-three".