20054220 has 48 divisors (see below), whose sum is σ = 59457888. Its totient is φ = 5032960.

The previous prime is 20054201. The next prime is 20054227. The reversal of 20054220 is 2245002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20054220.

It is not an unprimeable number, because it can be changed into a prime (20054227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8811 + ... + 10850.

It is an arithmetic number, because the mean of its divisors is an integer number (1238706).

Almost surely, 2^20054220 is an apocalyptic number.

20054220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20054220 is an abundant number, since it is smaller than the sum of its proper divisors (39403668).

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

20054220 is a wasteful number, since it uses less digits than its factorization.

20054220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19690 (or 19688 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20054220 is about 4478.1938323391. The cubic root of 20054220 is about 271.6868332017.

Adding to 20054220 its reverse (2245002), we get a palindrome (22299222).

The spelling of 20054220 in words is "twenty million, fifty-four thousand, two hundred twenty".