20351144 has 32 divisors (see below), whose sum is σ = 41826240. Its totient is φ = 9206400.

The previous prime is 20351143. The next prime is 20351153. The reversal of 20351144 is 44115302.

It is not an unprimeable number, because it can be changed into a prime (20351143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24317 + ... + 25139.

It is an arithmetic number, because the mean of its divisors is an integer number (1307070).

Almost surely, 2^20351144 is an apocalyptic number.

It is an amenable number.

20351144 is an abundant number, since it is smaller than the sum of its proper divisors (21475096).

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

20351144 is a wasteful number, since it uses less digits than its factorization.

20351144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20351144 is about 4511.2242240882. The cubic root of 20351144 is about 273.0211400215.

Adding to 20351144 its reverse (44115302), we get a palindrome (64466446).

The spelling of 20351144 in words is "twenty million, three hundred fifty-one thousand, one hundred forty-four".