20677069 has 16 divisors (see below), whose sum is σ = 25171200. Its totient is φ = 16946160.

The previous prime is 20677067. The next prime is 20677091. The reversal of 20677069 is 96077602.

It is not a de Polignac number, because 20677069 - 2¹ = 20677067 is a prime.

It is a super-2 number, since 2×20677069² = 855082364861522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20677061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6579 + ... + 9199.

It is an arithmetic number, because the mean of its divisors is an integer number (1573200).

Almost surely, 2^20677069 is an apocalyptic number.

It is an amenable number.

20677069 is a deficient number, since it is larger than the sum of its proper divisors (4494131).

20677069 is an equidigital number, since it uses as much as digits as its factorization.

20677069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 20677069 is about 4547.2045258598. The cubic root of 20677069 is about 274.4709121879.

The spelling of 20677069 in words is "twenty million, six hundred seventy-seven thousand, sixty-nine".