20115460 has 24 divisors (see below), whose sum is σ = 42960960. Its totient is φ = 7909344.

The previous prime is 20115451. The next prime is 20115467. The reversal of 20115460 is 6451102.

It is not an unprimeable number, because it can be changed into a prime (20115467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7344 + ... + 9703.

It is an arithmetic number, because the mean of its divisors is an integer number (1790040).

Almost surely, 2^20115460 is an apocalyptic number.

20115460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20115460 is an abundant number, since it is smaller than the sum of its proper divisors (22845500).

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

20115460 is a wasteful number, since it uses less digits than its factorization.

20115460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17115 (or 17113 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20115460 is about 4485.0261983627. The cubic root of 20115460 is about 271.9631041361.

Adding to 20115460 its reverse (6451102), we get a palindrome (26566562).

The spelling of 20115460 in words is "twenty million, one hundred fifteen thousand, four hundred sixty".