20768297397 has 8 divisors (see below), whose sum is σ = 27692792256. Its totient is φ = 13844667072.

The previous prime is 20768297383. The next prime is 20768297437. The reversal of 20768297397 is 79379286702.

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

It is not a de Polignac number, because 20768297397 - 2⁷ = 20768297269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20768297397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20768297357) 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, 157833 + ... + 257774.

It is an arithmetic number, because the mean of its divisors is an integer number (3461599032).

Almost surely, 2^20768297397 is an apocalyptic number.

It is an amenable number.

20768297397 is a deficient number, since it is larger than the sum of its proper divisors (6924494859).

20768297397 is a wasteful number, since it uses less digits than its factorization.

20768297397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432267.

The product of its (nonzero) digits is 16003008, while the sum is 60.

The spelling of 20768297397 in words is "twenty billion, seven hundred sixty-eight million, two hundred ninety-seven thousand, three hundred ninety-seven".