20355030 has 32 divisors (see below), whose sum is σ = 54280800. Its totient is φ = 5427936.

The previous prime is 20355019. The next prime is 20355031. The reversal of 20355030 is 3055302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20354994 and 20355012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20355031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37425 + ... + 37964.

It is an arithmetic number, because the mean of its divisors is an integer number (1696275).

Almost surely, 2^20355030 is an apocalyptic number.

20355030 is an abundant number, since it is smaller than the sum of its proper divisors (33925770).

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

20355030 is a wasteful number, since it uses less digits than its factorization.

20355030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75405 (or 75399 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 18.

The square root of 20355030 is about 4511.6549070158. The cubic root of 20355030 is about 273.0385164832.

The spelling of 20355030 in words is "twenty million, three hundred fifty-five thousand, thirty".