20644050 has 48 divisors (see below), whose sum is σ = 58514112. Its totient is φ = 4718400.

The previous prime is 20644049. The next prime is 20644079. The reversal of 20644050 is 5044602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8781 + ... + 10880.

It is an arithmetic number, because the mean of its divisors is an integer number (1219044).

Almost surely, 2^20644050 is an apocalyptic number.

20644050 is an abundant number, since it is smaller than the sum of its proper divisors (37870062).

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

20644050 is a wasteful number, since it uses less digits than its factorization.

20644050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19683 (or 19678 counting only the distinct ones).

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

The square root of 20644050 is about 4543.5723830484. The cubic root of 20644050 is about 274.3247344196.

Adding to 20644050 its reverse (5044602), we get a palindrome (25688652).

The spelling of 20644050 in words is "twenty million, six hundred forty-four thousand, fifty".