20698447 has 8 divisors (see below), whose sum is σ = 25805952. Its totient is φ = 16128600.

The previous prime is 20698397. The next prime is 20698453. The reversal of 20698447 is 74489602.

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 20698447 - 2⁷ = 20698319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20698477) 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, 134329 + ... + 134482.

It is an arithmetic number, because the mean of its divisors is an integer number (3225744).

Almost surely, 2^20698447 is an apocalyptic number.

20698447 is a deficient number, since it is larger than the sum of its proper divisors (5107505).

20698447 is a wasteful number, since it uses less digits than its factorization.

20698447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268829.

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

The square root of 20698447 is about 4549.5545935839. The cubic root of 20698447 is about 274.5654713368.

The spelling of 20698447 in words is "twenty million, six hundred ninety-eight thousand, four hundred forty-seven".