20309350 has 24 divisors (see below), whose sum is σ = 38700648. Its totient is φ = 7924800.

The previous prime is 20309327. The next prime is 20309369. The reversal of 20309350 is 5390302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2904 + ... + 7003.

It is an arithmetic number, because the mean of its divisors is an integer number (1612527).

Almost surely, 2^20309350 is an apocalyptic number.

20309350 is a deficient number, since it is larger than the sum of its proper divisors (18391298).

20309350 is a wasteful number, since it uses less digits than its factorization.

20309350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9960 (or 9955 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 20309350 is about 4506.5896196570. The cubic root of 20309350 is about 272.8341158820.

Adding to 20309350 its reverse (5390302), we get a palindrome (25699652).

The spelling of 20309350 in words is "twenty million, three hundred nine thousand, three hundred fifty".