20574131 has 8 divisors (see below), whose sum is σ = 22931280. Its totient is φ = 18344448.

The previous prime is 20574091. The next prime is 20574139. The reversal of 20574131 is 13147502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20574131 is a prime.

It is a super-2 number, since 2×20574131² = 846589732810322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20574097 and 20574106.

It is not an unprimeable number, because it can be changed into a prime (20574139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31526 + ... + 32171.

It is an arithmetic number, because the mean of its divisors is an integer number (2866410).

Almost surely, 2^20574131 is an apocalyptic number.

20574131 is a deficient number, since it is larger than the sum of its proper divisors (2357149).

20574131 is a wasteful number, since it uses less digits than its factorization.

20574131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63733.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20574131 is about 4535.8715810746. The cubic root of 20574131 is about 274.0146821124.

The spelling of 20574131 in words is "twenty million, five hundred seventy-four thousand, one hundred thirty-one".