20653420 has 24 divisors (see below), whose sum is σ = 44022384. Its totient is φ = 8137536.

The previous prime is 20653417. The next prime is 20653421. The reversal of 20653420 is 2435602.

It is a happy number.

It is a super-3 number, since 3×20653420³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20653391 and 20653400.

It is not an unprimeable number, because it can be changed into a prime (20653421) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6367 + ... + 9046.

It is an arithmetic number, because the mean of its divisors is an integer number (1834266).

Almost surely, 2^20653420 is an apocalyptic number.

20653420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20653420 is an abundant number, since it is smaller than the sum of its proper divisors (23368964).

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

20653420 is a wasteful number, since it uses less digits than its factorization.

20653420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15489 (or 15487 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20653420 is about 4544.6033930366. The cubic root of 20653420 is about 274.3662319934.

The spelling of 20653420 in words is "twenty million, six hundred fifty-three thousand, four hundred twenty".