20484769 has 4 divisors (see below), whose sum is σ = 21145600. Its totient is φ = 19823940.

The previous prime is 20484767. The next prime is 20484773. The reversal of 20484769 is 96748402.

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 20484769 - 2¹ = 20484767 is a prime.

It is a super-2 number, since 2×20484769² = 839251521966722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20484767) 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, 330369 + ... + 330430.

It is an arithmetic number, because the mean of its divisors is an integer number (5286400).

Almost surely, 2^20484769 is an apocalyptic number.

It is an amenable number.

20484769 is a deficient number, since it is larger than the sum of its proper divisors (660831).

20484769 is an equidigital number, since it uses as much as digits as its factorization.

20484769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660830.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 20484769 is about 4526.0102739609. The cubic root of 20484769 is about 273.6173864745.

The spelling of 20484769 in words is "twenty million, four hundred eighty-four thousand, seven hundred sixty-nine".