20349260 has 48 divisors (see below), whose sum is σ = 44470944. Its totient is φ = 7815168.

The previous prime is 20349253. The next prime is 20349269. The reversal of 20349260 is 6294302.

It is not an unprimeable number, because it can be changed into a prime (20349269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79052 + ... + 79308.

It is an arithmetic number, because the mean of its divisors is an integer number (926478).

Almost surely, 2^20349260 is an apocalyptic number.

20349260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20349260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22235472).

20349260 is an abundant number, since it is smaller than the sum of its proper divisors (24121684).

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

20349260 is a wasteful number, since it uses less digits than its factorization.

20349260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20349260 is about 4511.0154067571. The cubic root of 20349260 is about 273.0127148161.

The spelling of 20349260 in words is "twenty million, three hundred forty-nine thousand, two hundred sixty".