20670270 has 32 divisors (see below), whose sum is σ = 49737888. Its totient is φ = 5497728.

The previous prime is 20670263. The next prime is 20670311. The reversal of 20670270 is 7207602.

It is a self number, because there is not a number n which added to its sum of digits gives 20670270.

It is a congruent number.

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, 16092 + ... + 17328.

It is an arithmetic number, because the mean of its divisors is an integer number (1554309).

Almost surely, 2^20670270 is an apocalyptic number.

20670270 is an abundant number, since it is smaller than the sum of its proper divisors (29067618).

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

20670270 is a wasteful number, since it uses less digits than its factorization.

20670270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 20670270 is about 4546.4568622170. The cubic root of 20670270 is about 274.4408251978.

Adding to 20670270 its reverse (7207602), we get a palindrome (27877872).

The spelling of 20670270 in words is "twenty million, six hundred seventy thousand, two hundred seventy".