20425120 has 24 divisors (see below), whose sum is σ = 48254724. Its totient is φ = 8169984.

The previous prime is 20425117. The next prime is 20425121. The reversal of 20425120 is 2152402.

It can be written as a sum of positive squares in 2 ways, for example, as 16875664 + 3549456 = 4108^2 + 1884^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20425094 and 20425103.

It is not an unprimeable number, because it can be changed into a prime (20425121) 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, 63669 + ... + 63988.

Almost surely, 2^20425120 is an apocalyptic number.

20425120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20425120 is an abundant number, since it is smaller than the sum of its proper divisors (27829604).

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

20425120 is a wasteful number, since it uses less digits than its factorization.

20425120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127672 (or 127664 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20425120 is about 4519.4158914621. The cubic root of 20425120 is about 273.3515487894.

Adding to 20425120 its reverse (2152402), we get a palindrome (22577522).

The spelling of 20425120 in words is "twenty million, four hundred twenty-five thousand, one hundred twenty".