20554420 has 24 divisors (see below), whose sum is σ = 43898400. Its totient is φ = 8081952.

The previous prime is 20554393. The next prime is 20554421. The reversal of 20554420 is 2445502.

It is a junction number, because it is equal to n+sod(n) for n = 20554391 and 20554400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554421) 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, 7530 + ... + 9889.

It is an arithmetic number, because the mean of its divisors is an integer number (1829100).

Almost surely, 2^20554420 is an apocalyptic number.

20554420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20554420 is an abundant number, since it is smaller than the sum of its proper divisors (23343980).

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

20554420 is a wasteful number, since it uses less digits than its factorization.

20554420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17487 (or 17485 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20554420 is about 4533.6982696249. The cubic root of 20554420 is about 273.9271477688.

Adding to 20554420 its reverse (2445502), we get a palindrome (22999922).

The spelling of 20554420 in words is "twenty million, five hundred fifty-four thousand, four hundred twenty".