20120355 has 12 divisors (see below), whose sum is σ = 34875360. Its totient is φ = 10730832.

The previous prime is 20120323. The next prime is 20120363. The reversal of 20120355 is 55302102.

It is a happy number.

It is not a de Polignac number, because 20120355 - 2⁵ = 20120323 is a prime.

It is a zygodrome in base 7.

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, 223515 + ... + 223604.

It is an arithmetic number, because the mean of its divisors is an integer number (2906280).

Almost surely, 2^20120355 is an apocalyptic number.

20120355 is a deficient number, since it is larger than the sum of its proper divisors (14755005).

20120355 is a wasteful number, since it uses less digits than its factorization.

20120355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447130 (or 447127 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20120355 is about 4485.5718698957. The cubic root of 20120355 is about 271.9851626494.

Adding to 20120355 its reverse (55302102), we get a palindrome (75422457).

The spelling of 20120355 in words is "twenty million, one hundred twenty thousand, three hundred fifty-five".