20662420 has 24 divisors (see below), whose sum is σ = 44005248. Its totient is φ = 8148000.

The previous prime is 20662393. The next prime is 20662423. The reversal of 20662420 is 2426602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20662391 and 20662400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20662423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5856 + ... + 8695.

It is an arithmetic number, because the mean of its divisors is an integer number (1833552).

Almost surely, 2^20662420 is an apocalyptic number.

20662420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20662420 is an abundant number, since it is smaller than the sum of its proper divisors (23342828).

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

20662420 is a wasteful number, since it uses less digits than its factorization.

20662420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14631 (or 14629 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20662420 is about 4545.5934706043. The cubic root of 20662420 is about 274.4060791067.

It can be divided in two parts, 206 and 62420, that added together give a palindrome (62626).

The spelling of 20662420 in words is "twenty million, six hundred sixty-two thousand, four hundred twenty".