20146660 has 24 divisors (see below), whose sum is σ = 42618240. Its totient is φ = 7999584.

The previous prime is 20146639. The next prime is 20146681. The reversal of 20146660 is 6664102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20146639) and next prime (20146681).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844 + ... + 6403.

It is an arithmetic number, because the mean of its divisors is an integer number (1775760).

Almost surely, 2^20146660 is an apocalyptic number.

20146660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20146660 is an abundant number, since it is smaller than the sum of its proper divisors (22471580).

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

20146660 is a wasteful number, since it uses less digits than its factorization.

20146660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7395 (or 7393 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20146660 is about 4488.5030912321. The cubic root of 20146660 is about 272.1036405796.

The spelling of 20146660 in words is "twenty million, one hundred forty-six thousand, six hundred sixty".