20577147 has 8 divisors (see below), whose sum is σ = 27463440. Its totient is φ = 13704480.

The previous prime is 20577131. The next prime is 20577229. The reversal of 20577147 is 74177502.

It is a happy number.

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

It is not a de Polignac number, because 20577147 - 2⁴ = 20577131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20577547) 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, 897 + ... + 6477.

It is an arithmetic number, because the mean of its divisors is an integer number (3432930).

Almost surely, 2^20577147 is an apocalyptic number.

20577147 is a deficient number, since it is larger than the sum of its proper divisors (6886293).

20577147 is a wasteful number, since it uses less digits than its factorization.

20577147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6813.

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 20577147 is about 4536.2040298029. The cubic root of 20577147 is about 274.0280708982.

The spelling of 20577147 in words is "twenty million, five hundred seventy-seven thousand, one hundred forty-seven".