20269873 has 8 divisors (see below), whose sum is σ = 22187816. Its totient is φ = 18403200.

The previous prime is 20269871. The next prime is 20269889. The reversal of 20269873 is 37896202.

It can be written as a sum of positive squares in 4 ways, for example, as 91809 + 20178064 = 303^2 + 4492^2 .

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 20269873 - 2¹ = 20269871 is a prime.

It is a super-2 number, since 2×20269873² = 821735502872258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20269871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11988 + ... + 13573.

It is an arithmetic number, because the mean of its divisors is an integer number (2773477).

Almost surely, 2^20269873 is an apocalyptic number.

It is an amenable number.

20269873 is a deficient number, since it is larger than the sum of its proper divisors (1917943).

20269873 is a wasteful number, since it uses less digits than its factorization.

20269873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25635.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20269873 is about 4502.2075696263. The cubic root of 20269873 is about 272.6572243097.

The spelling of 20269873 in words is "twenty million, two hundred sixty-nine thousand, eight hundred seventy-three".