20698077 has 8 divisors (see below), whose sum is σ = 27632416. Its totient is φ = 13781232.

The previous prime is 20698063. The next prime is 20698081. The reversal of 20698077 is 77089602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20698077 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1303 + ... + 6564.

It is an arithmetic number, because the mean of its divisors is an integer number (3454052).

Almost surely, 2^20698077 is an apocalyptic number.

It is an amenable number.

20698077 is a deficient number, since it is larger than the sum of its proper divisors (6934339).

20698077 is an equidigital number, since it uses as much as digits as its factorization.

20698077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 20698077 is about 4549.5139300809. The cubic root of 20698077 is about 274.5638353070.

The spelling of 20698077 in words is "twenty million, six hundred ninety-eight thousand, seventy-seven".