20144355 has 64 divisors (see below), whose sum is σ = 40808448. Its totient is φ = 8242560.

The previous prime is 20144347. The next prime is 20144387. The reversal of 20144355 is 55344102.

20144355 = 473² + 474² + ... + 549².

It is not a de Polignac number, because 20144355 - 2³ = 20144347 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 123504 + ... + 123666.

It is an arithmetic number, because the mean of its divisors is an integer number (637632).

Almost surely, 2^20144355 is an apocalyptic number.

20144355 is an abundant number, since it is smaller than the sum of its proper divisors (20664093).

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

20144355 is a wasteful number, since it uses less digits than its factorization.

20144355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20144355 is about 4488.2463167701. The cubic root of 20144355 is about 272.0932629651.

Adding to 20144355 its reverse (55344102), we get a palindrome (75488457).

The spelling of 20144355 in words is "twenty million, one hundred forty-four thousand, three hundred fifty-five".