20374157 has 4 divisors (see below), whose sum is σ = 20384700. Its totient is φ = 20363616.

The previous prime is 20374141. The next prime is 20374163. The reversal of 20374157 is 75147302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10426441 + 9947716 = 3229^2 + 3154^2 .

It is a cyclic number.

It is not a de Polignac number, because 20374157 - 2⁴ = 20374141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20374127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1448 + ... + 6545.

It is an arithmetic number, because the mean of its divisors is an integer number (5096175).

Almost surely, 2^20374157 is an apocalyptic number.

It is an amenable number.

20374157 is a deficient number, since it is larger than the sum of its proper divisors (10543).

20374157 is an equidigital number, since it uses as much as digits as its factorization.

20374157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10542.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20374157 is about 4513.7741414475. The cubic root of 20374157 is about 273.1240116947.

The spelling of 20374157 in words is "twenty million, three hundred seventy-four thousand, one hundred fifty-seven".