20307192 has 64 divisors (see below), whose sum is σ = 53136000. Its totient is φ = 6459264.

The previous prime is 20307179. The next prime is 20307233. The reversal of 20307192 is 29170302.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 113359 + ... + 113537.

It is an arithmetic number, because the mean of its divisors is an integer number (830250).

Almost surely, 2^20307192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20307192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26568000).

20307192 is an abundant number, since it is smaller than the sum of its proper divisors (32828808).

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

20307192 is a wasteful number, since it uses less digits than its factorization.

20307192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20307192 is about 4506.3501861262. The cubic root of 20307192 is about 272.8244520756.

Adding to 20307192 its reverse (29170302), we get a palindrome (49477494).

The spelling of 20307192 in words is "twenty million, three hundred seven thousand, one hundred ninety-two".