20071497 has 8 divisors (see below), whose sum is σ = 27384544. Its totient is φ = 13069728.

The previous prime is 20071483. The next prime is 20071517. The reversal of 20071497 is 79417002.

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

It is not a de Polignac number, because 20071497 - 2⁴ = 20071481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20071417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77668 + ... + 77925.

It is an arithmetic number, because the mean of its divisors is an integer number (3423068).

Almost surely, 2^20071497 is an apocalyptic number.

It is an amenable number.

20071497 is a deficient number, since it is larger than the sum of its proper divisors (7313047).

20071497 is a wasteful number, since it uses less digits than its factorization.

20071497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155639.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 20071497 is about 4480.1224313628. The cubic root of 20071497 is about 271.7648315166.

Adding to 20071497 its reverse (79417002), we get a palindrome (99488499).

The spelling of 20071497 in words is "twenty million, seventy-one thousand, four hundred ninety-seven".