20354420 has 12 divisors (see below), whose sum is σ = 42744324. Its totient is φ = 8141760.

The previous prime is 20354413. The next prime is 20354441. The reversal of 20354420 is 2445302.

It can be written as a sum of positive squares in 2 ways, for example, as 4177936 + 16176484 = 2044^2 + 4022^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1017721 = 20354420 / (2 + 0 + 3 + 5 + 4 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 20354392 and 20354401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508841 + ... + 508880.

It is an arithmetic number, because the mean of its divisors is an integer number (3562027).

Almost surely, 2^20354420 is an apocalyptic number.

20354420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20354420 is an abundant number, since it is smaller than the sum of its proper divisors (22389904).

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

20354420 is a wasteful number, since it uses less digits than its factorization.

20354420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017730 (or 1017728 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20354420 is about 4511.5873038211. The cubic root of 20354420 is about 273.0357889812.

Adding to 20354420 its reverse (2445302), we get a palindrome (22799722).

The spelling of 20354420 in words is "twenty million, three hundred fifty-four thousand, four hundred twenty".