20055507 has 8 divisors (see below), whose sum is σ = 28148160. Its totient is φ = 12666600.

The previous prime is 20055491. The next prime is 20055547. The reversal of 20055507 is 70555002.

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

It is not a de Polignac number, because 20055507 - 2⁴ = 20055491 is a prime.

It is a super-2 number, since 2×20055507² = 804446722054098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20055547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175869 + ... + 175982.

It is an arithmetic number, because the mean of its divisors is an integer number (3518520).

Almost surely, 2^20055507 is an apocalyptic number.

20055507 is a deficient number, since it is larger than the sum of its proper divisors (8092653).

20055507 is a wasteful number, since it uses less digits than its factorization.

20055507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351873.

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 20055507 is about 4478.3375263595. The cubic root of 20055507 is about 271.6926450038.

The spelling of 20055507 in words is "twenty million, fifty-five thousand, five hundred seven".