20671070 has 64 divisors (see below), whose sum is σ = 44568576. Its totient is φ = 6756480.

The previous prime is 20671033. The next prime is 20671073. The reversal of 20671070 is 7017602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20671073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200639 + ... + 200741.

It is an arithmetic number, because the mean of its divisors is an integer number (696384).

Almost surely, 2^20671070 is an apocalyptic number.

20671070 is an abundant number, since it is smaller than the sum of its proper divisors (23897506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20671070 is a wasteful number, since it uses less digits than its factorization.

20671070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 20671070 is about 4546.5448419652. The cubic root of 20671070 is about 274.4443657068. Note that the first 3 decimals are identical.

Adding to 20671070 its reverse (7017602), we get a palindrome (27688672).

The spelling of 20671070 in words is "twenty million, six hundred seventy-one thousand, seventy".