20570065 has 16 divisors (see below), whose sum is σ = 26107200. Its totient is φ = 15515712.

The previous prime is 20570057. The next prime is 20570083. The reversal of 20570065 is 56007502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20570065 - 2³ = 20570057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27466 + ... + 28204.

It is an arithmetic number, because the mean of its divisors is an integer number (1631700).

Almost surely, 2^20570065 is an apocalyptic number.

It is an amenable number.

20570065 is a deficient number, since it is larger than the sum of its proper divisors (5537135).

20570065 is a wasteful number, since it uses less digits than its factorization.

20570065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 20570065 is about 4535.4233539991. The cubic root of 20570065 is about 273.9966300401.

Adding to 20570065 its reverse (56007502), we get a palindrome (76577567).

The spelling of 20570065 in words is "twenty million, five hundred seventy thousand, sixty-five".