20309334 has 32 divisors (see below), whose sum is σ = 41783040. Its totient is φ = 6578592.

The previous prime is 20309327. The next prime is 20309369. The reversal of 20309334 is 43390302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36184 + ... + 36740.

It is an arithmetic number, because the mean of its divisors is an integer number (1305720).

Almost surely, 2^20309334 is an apocalyptic number.

20309334 is an abundant number, since it is smaller than the sum of its proper divisors (21473706).

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

20309334 is a wasteful number, since it uses less digits than its factorization.

20309334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 20309334 is about 4506.5878444783. The cubic root of 20309334 is about 272.8340442344.

Adding to 20309334 its reverse (43390302), we get a palindrome (63699636).

The spelling of 20309334 in words is "twenty million, three hundred nine thousand, three hundred thirty-four".