20051420 has 24 divisors (see below), whose sum is σ = 43467648. Its totient is φ = 7761600.

The previous prime is 20051411. The next prime is 20051431. The reversal of 20051420 is 2415002.

It is a junction number, because it is equal to n+sod(n) for n = 20051395 and 20051404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15551 + ... + 16790.

It is an arithmetic number, because the mean of its divisors is an integer number (1811152).

Almost surely, 2^20051420 is an apocalyptic number.

20051420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20051420 is an abundant number, since it is smaller than the sum of its proper divisors (23416228).

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

20051420 is a wasteful number, since it uses less digits than its factorization.

20051420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32381 (or 32379 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20051420 is about 4477.8811953869. The cubic root of 20051420 is about 271.6741881734.

Adding to 20051420 its reverse (2415002), we get a palindrome (22466422).

The spelling of 20051420 in words is "twenty million, fifty-one thousand, four hundred twenty".