20163444 has 24 divisors (see below), whose sum is σ = 53769408. Its totient is φ = 5760960.

The previous prime is 20163443. The next prime is 20163457. The reversal of 20163444 is 44436102.

It is a super-2 number, since 2×20163444² = 813128947882272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163443) 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, 119937 + ... + 120104.

It is an arithmetic number, because the mean of its divisors is an integer number (2240392).

Almost surely, 2^20163444 is an apocalyptic number.

It is an amenable number.

20163444 is an abundant number, since it is smaller than the sum of its proper divisors (33605964).

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

20163444 is a wasteful number, since it uses less digits than its factorization.

20163444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240055 (or 240053 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20163444 is about 4490.3723676328. The cubic root of 20163444 is about 272.1791819655.

Adding to 20163444 its reverse (44436102), we get a palindrome (64599546).

It can be divided in two parts, 2016 and 3444, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 20163444 in words is "twenty million, one hundred sixty-three thousand, four hundred forty-four".