20498269 has 4 divisors (see below), whose sum is σ = 22361760. Its totient is φ = 18634780.

The previous prime is 20498263. The next prime is 20498279. The reversal of 20498269 is 96289402.

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 20498269 - 2¹¹ = 20496221 is a prime.

It is a super-2 number, since 2×20498269² = 840358063992722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20498263) 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, 931729 + ... + 931750.

It is an arithmetic number, because the mean of its divisors is an integer number (5590440).

Almost surely, 2^20498269 is an apocalyptic number.

It is an amenable number.

20498269 is a deficient number, since it is larger than the sum of its proper divisors (1863491).

20498269 is a wasteful number, since it uses less digits than its factorization.

20498269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863490.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 20498269 is about 4527.5014080616. The cubic root of 20498269 is about 273.6774802865.

The spelling of 20498269 in words is "twenty million, four hundred ninety-eight thousand, two hundred sixty-nine".