20065420 has 24 divisors (see below), whose sum is σ = 42575904. Its totient is φ = 7942656.

The previous prime is 20065417. The next prime is 20065427. The reversal of 20065420 is 2456002.

It is not an unprimeable number, because it can be changed into a prime (20065427) 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, 3232 + ... + 7111.

It is an arithmetic number, because the mean of its divisors is an integer number (1773996).

Almost surely, 2^20065420 is an apocalyptic number.

20065420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20065420 is an abundant number, since it is smaller than the sum of its proper divisors (22510484).

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

20065420 is a wasteful number, since it uses less digits than its factorization.

20065420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10449 (or 10447 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20065420 is about 4479.4441619469. Note that the first 3 decimals coincide. The cubic root of 20065420 is about 271.7374015482.

The spelling of 20065420 in words is "twenty million, sixty-five thousand, four hundred twenty".