20040055 has 8 divisors (see below), whose sum is σ = 27483552. Its totient is φ = 13741728.

The previous prime is 20040049. The next prime is 20040067. The reversal of 20040055 is 55004002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20040055 - 2¹³ = 20031863 is a prime.

It is a Duffinian number.

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, 286252 + ... + 286321.

It is an arithmetic number, because the mean of its divisors is an integer number (3435444).

Almost surely, 2^20040055 is an apocalyptic number.

20040055 is a deficient number, since it is larger than the sum of its proper divisors (7443497).

20040055 is an equidigital number, since it uses as much as digits as its factorization.

20040055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572585.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 20040055 is about 4476.6120001626. The cubic root of 20040055 is about 271.6228508172.

Adding to 20040055 its reverse (55004002), we get a palindrome (75044057).

The spelling of 20040055 in words is "twenty million, forty thousand, fifty-five".