20288370 has 16 divisors (see below), whose sum is σ = 48692160. Its totient is φ = 5410224.

The previous prime is 20288339. The next prime is 20288381. The reversal of 20288370 is 7388202.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 676279 = 20288370 / (2 + 0 + 2 + 8 + 8 + 3 + 7 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338110 + ... + 338169.

It is an arithmetic number, because the mean of its divisors is an integer number (3043260).

Almost surely, 2^20288370 is an apocalyptic number.

20288370 is an abundant number, since it is smaller than the sum of its proper divisors (28403790).

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

20288370 is a wasteful number, since it uses less digits than its factorization.

20288370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676289.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20288370 is about 4504.2613156876. The cubic root of 20288370 is about 272.7401356559.

The spelling of 20288370 in words is "twenty million, two hundred eighty-eight thousand, three hundred seventy".