20731070 has 8 divisors (see below), whose sum is σ = 37315944. Its totient is φ = 8292424.

The previous prime is 20731069. The next prime is 20731091. The reversal of 20731070 is 7013702.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036544 + ... + 1036563.

It is an arithmetic number, because the mean of its divisors is an integer number (4664493).

Almost surely, 2^20731070 is an apocalyptic number.

20731070 is a deficient number, since it is larger than the sum of its proper divisors (16584874).

20731070 is a wasteful number, since it uses less digits than its factorization.

20731070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073114.

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

The square root of 20731070 is about 4553.1384780171. The cubic root of 20731070 is about 274.7096439515.

Adding to 20731070 its reverse (7013702), we get a palindrome (27744772).

The spelling of 20731070 in words is "twenty million, seven hundred thirty-one thousand, seventy".