20574345 has 16 divisors (see below), whose sum is σ = 35911872. Its totient is φ = 9975360.

The previous prime is 20574341. The next prime is 20574347. The reversal of 20574345 is 54347502.

It is not a de Polignac number, because 20574345 - 2² = 20574341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20574341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62182 + ... + 62511.

It is an arithmetic number, because the mean of its divisors is an integer number (2244492).

Almost surely, 2^20574345 is an apocalyptic number.

It is an amenable number.

20574345 is a deficient number, since it is larger than the sum of its proper divisors (15337527).

20574345 is a wasteful number, since it uses less digits than its factorization.

20574345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124712.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 20574345 is about 4535.8951707463. The cubic root of 20574345 is about 274.0156321555.

The spelling of 20574345 in words is "twenty million, five hundred seventy-four thousand, three hundred forty-five".