15020420 has 12 divisors (see below), whose sum is σ = 31542924. Its totient is φ = 6008160.

The previous prime is 15020419. The next prime is 15020429. The reversal of 15020420 is 2402051.

It can be written as a sum of positive squares in 2 ways, for example, as 5827396 + 9193024 = 2414^2 + 3032^2 .

It is a super-2 number, since 2×15020420² = 451226033952800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15020395 and 15020404.

It is not an unprimeable number, because it can be changed into a prime (15020429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375491 + ... + 375530.

It is an arithmetic number, because the mean of its divisors is an integer number (2628577).

Almost surely, 2^15020420 is an apocalyptic number.

15020420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15020420 is an abundant number, since it is smaller than the sum of its proper divisors (16522504).

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

15020420 is a wasteful number, since it uses less digits than its factorization.

15020420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751030 (or 751028 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 15020420 is about 3875.6186602915. The cubic root of 15020420 is about 246.7330679121.

Adding to 15020420 its reverse (2402051), we get a palindrome (17422471).

The spelling of 15020420 in words is "fifteen million, twenty thousand, four hundred twenty".