20040120 has 48 divisors (see below), whose sum is σ = 65131560. Its totient is φ = 5343936.

The previous prime is 20040071. The next prime is 20040133. The reversal of 20040120 is 2104002.

It is a super-2 number, since 2×20040120² = 803212819228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27474 + ... + 28193.

Almost surely, 2^20040120 is an apocalyptic number.

20040120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20040120 is an abundant number, since it is smaller than the sum of its proper divisors (45091440).

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

20040120 is a wasteful number, since it uses less digits than its factorization.

20040120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55684 (or 55677 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 20040120 is about 4476.6192601114. The cubic root of 20040120 is about 271.6231444868.

Adding to 20040120 its reverse (2104002), we get a palindrome (22144122).

The spelling of 20040120 in words is "twenty million, forty thousand, one hundred twenty".