20697079 has 8 divisors (see below), whose sum is σ = 23258592. Its totient is φ = 18274080.

The previous prime is 20697077. The next prime is 20697091. The reversal of 20697079 is 97079602.

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 20697079 - 2¹ = 20697077 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 (20697071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34312 + ... + 34909.

It is an arithmetic number, because the mean of its divisors is an integer number (2907324).

Almost surely, 2^20697079 is an apocalyptic number.

20697079 is a deficient number, since it is larger than the sum of its proper divisors (2561513).

20697079 is a wasteful number, since it uses less digits than its factorization.

20697079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69257.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 20697079 is about 4549.4042467119. The cubic root of 20697079 is about 274.5594223509.

The spelling of 20697079 in words is "twenty million, six hundred ninety-seven thousand, seventy-nine".