20169660 has 48 divisors (see below), whose sum is σ = 64544256. Its totient is φ = 4610112.

The previous prime is 20169649. The next prime is 20169661. The reversal of 20169660 is 6696102.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20169661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23592 + ... + 24431.

It is an arithmetic number, because the mean of its divisors is an integer number (1344672).

Almost surely, 2^20169660 is an apocalyptic number.

20169660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20169660 is an abundant number, since it is smaller than the sum of its proper divisors (44374596).

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

20169660 is a wasteful number, since it uses less digits than its factorization.

20169660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48042 (or 48040 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20169660 is about 4491.0644617952. The cubic root of 20169660 is about 272.2071482853.

The spelling of 20169660 in words is "twenty million, one hundred sixty-nine thousand, six hundred sixty".