20200120 has 32 divisors (see below), whose sum is σ = 45612000. Its totient is φ = 8051328.

The previous prime is 20200111. The next prime is 20200121. The reversal of 20200120 is 2100202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200121) 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, 13237 + ... + 14683.

It is an arithmetic number, because the mean of its divisors is an integer number (1425375).

Almost surely, 2^20200120 is an apocalyptic number.

20200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20200120 is an abundant number, since it is smaller than the sum of its proper divisors (25411880).

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

20200120 is a wasteful number, since it uses less digits than its factorization.

20200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807 (or 1803 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20200120 is about 4494.4543606538. The cubic root of 20200120 is about 272.3441074500.

Adding to 20200120 its reverse (2100202), we get a palindrome (22300322).

The spelling of 20200120 in words is "twenty million, two hundred thousand, one hundred twenty".