20145336 has 32 divisors (see below), whose sum is σ = 50544000. Its totient is φ = 6691040.

The previous prime is 20145329. The next prime is 20145341. The reversal of 20145336 is 63354102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6115 + ... + 8813.

It is an arithmetic number, because the mean of its divisors is an integer number (1579500).

Almost surely, 2^20145336 is an apocalyptic number.

It is an amenable number.

20145336 is an abundant number, since it is smaller than the sum of its proper divisors (30398664).

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

20145336 is a wasteful number, since it uses less digits than its factorization.

20145336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019 (or 3015 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20145336 is about 4488.3556008855. The cubic root of 20145336 is about 272.0976797386.

Adding to 20145336 its reverse (63354102), we get a palindrome (83499438).

The spelling of 20145336 in words is "twenty million, one hundred forty-five thousand, three hundred thirty-six".