20343660 has 48 divisors (see below), whose sum is σ = 57170400. Its totient is φ = 5405184.

The previous prime is 20343649. The next prime is 20343677. The reversal of 20343660 is 6634302.

It is a self number, because there is not a number n which added to its sum of digits gives 20343660.

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, 24126 + ... + 24954.

It is an arithmetic number, because the mean of its divisors is an integer number (1191050).

Almost surely, 2^20343660 is an apocalyptic number.

20343660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20343660 is an abundant number, since it is smaller than the sum of its proper divisors (36826740).

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

20343660 is a wasteful number, since it uses less digits than its factorization.

20343660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 20343660 is about 4510.3946612242. The cubic root of 20343660 is about 272.9876686724.

Adding to 20343660 its reverse (6634302), we get a palindrome (26977962).

The spelling of 20343660 in words is "twenty million, three hundred forty-three thousand, six hundred sixty".