20011120 has 40 divisors (see below), whose sum is σ = 48032640. Its totient is φ = 7745280.

The previous prime is 20011099. The next prime is 20011139. The reversal of 20011120 is 2111002.

It is a tau number, because it is divible by the number of its divisors (40).

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, 1555 + ... + 6514.

It is an arithmetic number, because the mean of its divisors is an integer number (1200816).

Almost surely, 2^20011120 is an apocalyptic number.

20011120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011120 is an abundant number, since it is smaller than the sum of its proper divisors (28021520).

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

20011120 is a wasteful number, since it uses less digits than its factorization.

20011120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8113 (or 8107 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 20011120 is about 4473.3790360308. The cubic root of 20011120 is about 271.4920595453.

Adding to 20011120 its reverse (2111002), we get a palindrome (22122122).

The spelling of 20011120 in words is "twenty million, eleven thousand, one hundred twenty".