20797045 has 8 divisors (see below), whose sum is σ = 25565400. Its totient is φ = 16231680.

The previous prime is 20797033. The next prime is 20797057. The reversal of 20797045 is 54079702.

It is an interprime number because it is at equal distance from previous prime (20797033) and next prime (20797057).

It can be written as a sum of positive squares in 4 ways, for example, as 167281 + 20629764 = 409^2 + 4542^2 .

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

It is not a de Polignac number, because 20797045 - 2⁵ = 20797013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20797045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50520 + ... + 50929.

It is an arithmetic number, because the mean of its divisors is an integer number (3195675).

Almost surely, 2^20797045 is an apocalyptic number.

It is an amenable number.

20797045 is a deficient number, since it is larger than the sum of its proper divisors (4768355).

20797045 is a wasteful number, since it uses less digits than its factorization.

20797045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101495.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 20797045 is about 4560.3777255837. The cubic root of 20797045 is about 275.0007493093. Note that the first 3 decimals are identical.

The spelling of 20797045 in words is "twenty million, seven hundred ninety-seven thousand, forty-five".