20079997 has 4 divisors (see below), whose sum is σ = 22948576. Its totient is φ = 17211420.

The previous prime is 20079991. The next prime is 20080003. The reversal of 20079997 is 79997002.

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 an interprime number because it is at equal distance from previous prime (20079991) and next prime (20080003).

It is a cyclic number.

It is not a de Polignac number, because 20079997 - 2⁷ = 20079869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20079991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1434279 + ... + 1434292.

It is an arithmetic number, because the mean of its divisors is an integer number (5737144).

Almost surely, 2^20079997 is an apocalyptic number.

It is an amenable number.

20079997 is a deficient number, since it is larger than the sum of its proper divisors (2868579).

20079997 is an equidigital number, since it uses as much as digits as its factorization.

20079997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868578.

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 20079997 is about 4481.0709657402. The cubic root of 20079997 is about 271.8031889787.

The spelling of 20079997 in words is "twenty million, seventy-nine thousand, nine hundred ninety-seven".