20350350 has 72 divisors (see below), whose sum is σ = 56058912. Its totient is φ = 5289600.

The previous prime is 20350289. The next prime is 20350367. The reversal of 20350350 is 5305302.

It is a super-3 number, since 3×20350350³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17899 + ... + 19001.

It is an arithmetic number, because the mean of its divisors is an integer number (778596).

Almost surely, 2^20350350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20350350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28029456).

20350350 is an abundant number, since it is smaller than the sum of its proper divisors (35708562).

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

20350350 is a wasteful number, since it uses less digits than its factorization.

20350350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 18.

The square root of 20350350 is about 4511.1362205103. The cubic root of 20350350 is about 273.0175893348.

Adding to 20350350 its reverse (5305302), we get a palindrome (25655652).

The spelling of 20350350 in words is "twenty million, three hundred fifty thousand, three hundred fifty".