20207157 has 8 divisors (see below), whose sum is σ = 26981760. Its totient is φ = 13452000.

The previous prime is 20207153. The next prime is 20207191. The reversal of 20207157 is 75170202.

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

It is not a de Polignac number, because 20207157 - 2² = 20207153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20207153) 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, 2232 + ... + 6737.

It is an arithmetic number, because the mean of its divisors is an integer number (3372720).

Almost surely, 2^20207157 is an apocalyptic number.

It is an amenable number.

20207157 is a deficient number, since it is larger than the sum of its proper divisors (6774603).

20207157 is an equidigital number, since it uses as much as digits as its factorization.

20207157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9723.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 20207157 is about 4495.2371461359. The cubic root of 20207157 is about 272.3757287635.

Adding to 20207157 its reverse (75170202), we get a palindrome (95377359).

The spelling of 20207157 in words is "twenty million, two hundred seven thousand, one hundred fifty-seven".