20797507 has 2 divisors, whose sum is σ = 20797508. Its totient is φ = 20797506.

The previous prime is 20797501. The next prime is 20797531. The reversal of 20797507 is 70579702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20797507 - 2³ = 20797499 is a prime.

It is not a weakly prime, because it can be changed into another prime (20797501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10398753 + 10398754.

It is an arithmetic number, because the mean of its divisors is an integer number (10398754).

Almost surely, 2^20797507 is an apocalyptic number.

20797507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20797507 is an equidigital number, since it uses as much as digits as its factorization.

20797507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30870, while the sum is 37.

The square root of 20797507 is about 4560.4283790013. The cubic root of 20797507 is about 275.0027856467.

The spelling of 20797507 in words is "twenty million, seven hundred ninety-seven thousand, five hundred seven".