20770170 has 32 divisors (see below), whose sum is σ = 50792832. Its totient is φ = 5433792.

The previous prime is 20770163. The next prime is 20770187. The reversal of 20770170 is 7107702.

It is a self number, because there is not a number n which added to its sum of digits gives 20770170.

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, 4942 + ... + 8121.

It is an arithmetic number, because the mean of its divisors is an integer number (1587276).

Almost surely, 2^20770170 is an apocalyptic number.

20770170 is an abundant number, since it is smaller than the sum of its proper divisors (30022662).

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

20770170 is a wasteful number, since it uses less digits than its factorization.

20770170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13126.

The product of its (nonzero) digits is 686, while the sum is 24.

The square root of 20770170 is about 4557.4301969421. The cubic root of 20770170 is about 274.8822415926.

Adding to 20770170 its reverse (7107702), we get a palindrome (27877872).

The spelling of 20770170 in words is "twenty million, seven hundred seventy thousand, one hundred seventy".