20457097 has 4 divisors (see below), whose sum is σ = 21346560. Its totient is φ = 19567636.

The previous prime is 20457067. The next prime is 20457119. The reversal of 20457097 is 79075402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20457097 - 2¹⁵ = 20424329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20457037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444697 + ... + 444742.

It is an arithmetic number, because the mean of its divisors is an integer number (5336640).

Almost surely, 2^20457097 is an apocalyptic number.

It is an amenable number.

20457097 is a deficient number, since it is larger than the sum of its proper divisors (889463).

20457097 is an equidigital number, since it uses as much as digits as its factorization.

20457097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889462.

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

The square root of 20457097 is about 4522.9522438337. The cubic root of 20457097 is about 273.4941249391.

The spelling of 20457097 in words is "twenty million, four hundred fifty-seven thousand, ninety-seven".