20317070 has 32 divisors (see below), whose sum is σ = 38462688. Its totient is φ = 7717248.

The previous prime is 20317067. The next prime is 20317093. The reversal of 20317070 is 7071302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15272 + ... + 16548.

It is an arithmetic number, because the mean of its divisors is an integer number (1201959).

Almost surely, 2^20317070 is an apocalyptic number.

20317070 is a deficient number, since it is larger than the sum of its proper divisors (18145618).

20317070 is a wasteful number, since it uses less digits than its factorization.

20317070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364.

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 20317070 is about 4507.4460617960. The cubic root of 20317070 is about 272.8686814482.

Adding to 20317070 its reverse (7071302), we get a palindrome (27388372).

The spelling of 20317070 in words is "twenty million, three hundred seventeen thousand, seventy".