20702160 has 60 divisors (see below), whose sum is σ = 69527172. Its totient is φ = 5520384.

The previous prime is 20702147. The next prime is 20702161. The reversal of 20702160 is 6120702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14107536 + 6594624 = 3756^2 + 2568^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20702161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13657 + ... + 15096.

Almost surely, 2^20702160 is an apocalyptic number.

20702160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20702160 is an abundant number, since it is smaller than the sum of its proper divisors (48825012).

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

20702160 is a wasteful number, since it uses less digits than its factorization.

20702160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28772 (or 28763 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20702160 is about 4549.9626372092. The cubic root of 20702160 is about 274.5818880377.

Adding to 20702160 its reverse (6120702), we get a palindrome (26822862).

The spelling of 20702160 in words is "twenty million, seven hundred two thousand, one hundred sixty".