20152897 has 2 divisors, whose sum is σ = 20152898. Its totient is φ = 20152896.

The previous prime is 20152889. The next prime is 20152907. The reversal of 20152897 is 79825102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11296321 + 8856576 = 3361^2 + 2976^2 .

It is a cyclic number.

It is not a de Polignac number, because 20152897 - 2³ = 20152889 is a prime.

It is a super-2 number, since 2×20152897² = 812278514985218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20152397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10076448 + 10076449.

It is an arithmetic number, because the mean of its divisors is an integer number (10076449).

Almost surely, 2^20152897 is an apocalyptic number.

It is an amenable number.

20152897 is a deficient number, since it is larger than the sum of its proper divisors (1).

20152897 is an equidigital number, since it uses as much as digits as its factorization.

20152897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 20152897 is about 4489.1978125273. The cubic root of 20152897 is about 272.1317169507.

Adding to 20152897 its reverse (79825102), we get a palindrome (99977999).

The spelling of 20152897 in words is "twenty million, one hundred fifty-two thousand, eight hundred ninety-seven".