20352144 has 20 divisors (see below), whose sum is σ = 52576496. Its totient is φ = 6784032.

The previous prime is 20352127. The next prime is 20352161. The reversal of 20352144 is 44125302.

It is an interprime number because it is at equal distance from previous prime (20352127) and next prime (20352161).

It is a self number, because there is not a number n which added to its sum of digits gives 20352144.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211954 + ... + 212049.

Almost surely, 2^20352144 is an apocalyptic number.

20352144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20352144 is an abundant number, since it is smaller than the sum of its proper divisors (32224352).

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

20352144 is a wasteful number, since it uses less digits than its factorization.

20352144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424014 (or 424008 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20352144 is about 4511.3350573860. The cubic root of 20352144 is about 273.0256117876.

Adding to 20352144 its reverse (44125302), we get a palindrome (64477446).

The spelling of 20352144 in words is "twenty million, three hundred fifty-two thousand, one hundred forty-four".