20425400 has 48 divisors (see below), whose sum is σ = 48174000. Its totient is φ = 8052480.

The previous prime is 20425397. The next prime is 20425417. The reversal of 20425400 is 452402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13901 + ... + 15299.

It is an arithmetic number, because the mean of its divisors is an integer number (1003625).

Almost surely, 2^20425400 is an apocalyptic number.

20425400 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 20425400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24087000).

20425400 is an abundant number, since it is smaller than the sum of its proper divisors (27748600).

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

20425400 is a wasteful number, since it uses less digits than its factorization.

20425400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488 (or 1479 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20425400 is about 4519.4468688104. The cubic root of 20425400 is about 273.3527978736.

Adding to 20425400 its reverse (452402), we get a palindrome (20877802).

The spelling of 20425400 in words is "twenty million, four hundred twenty-five thousand, four hundred".