20120420 has 12 divisors (see below), whose sum is σ = 42252924. Its totient is φ = 8048160.

The previous prime is 20120407. The next prime is 20120437. The reversal of 20120420 is 2402102.

It can be written as a sum of positive squares in 2 ways, for example, as 13235044 + 6885376 = 3638^2 + 2624^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502991 + ... + 503030.

It is an arithmetic number, because the mean of its divisors is an integer number (3521077).

Almost surely, 2^20120420 is an apocalyptic number.

20120420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120420 is an abundant number, since it is smaller than the sum of its proper divisors (22132504).

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

20120420 is a wasteful number, since it uses less digits than its factorization.

20120420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006030 (or 1006028 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20120420 is about 4485.5791153429. The cubic root of 20120420 is about 271.9854555372.

Adding to 20120420 its reverse (2402102), we get a palindrome (22522522).

The spelling of 20120420 in words is "twenty million, one hundred twenty thousand, four hundred twenty".