20653350 has 48 divisors (see below), whose sum is σ = 51605328. Its totient is φ = 5466240.

The previous prime is 20653331. The next prime is 20653357. The reversal of 20653350 is 5335602.

It is a self number, because there is not a number n which added to its sum of digits gives 20653350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20653357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23112 + ... + 23988.

It is an arithmetic number, because the mean of its divisors is an integer number (1075111).

Almost surely, 2^20653350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20653350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25802664).

20653350 is an abundant number, since it is smaller than the sum of its proper divisors (30951978).

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

20653350 is a wasteful number, since it uses less digits than its factorization.

20653350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 20653350 is about 4544.5956915880. The cubic root of 20653350 is about 274.3659220261.

Adding to 20653350 its reverse (5335602), we get a palindrome (25988952).

The spelling of 20653350 in words is "twenty million, six hundred fifty-three thousand, three hundred fifty".