20716069 has 4 divisors (see below), whose sum is σ = 22599360. Its totient is φ = 18832780.

The previous prime is 20716043. The next prime is 20716079. The reversal of 20716069 is 96061702.

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 20716069 - 2⁵ = 20716037 is a prime.

It is a super-2 number, since 2×20716069² = 858311029625522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20716069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20716079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 941629 + ... + 941650.

It is an arithmetic number, because the mean of its divisors is an integer number (5649840).

Almost surely, 2^20716069 is an apocalyptic number.

It is an amenable number.

20716069 is a deficient number, since it is larger than the sum of its proper divisors (1883291).

20716069 is a wasteful number, since it uses less digits than its factorization.

20716069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883290.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 20716069 is about 4551.4908546541. The cubic root of 20716069 is about 274.6433680070.

The spelling of 20716069 in words is "twenty million, seven hundred sixteen thousand, sixty-nine".