20388435 has 16 divisors (see below), whose sum is σ = 33110016. Its totient is φ = 10711008.

The previous prime is 20388427. The next prime is 20388437. The reversal of 20388435 is 53488302.

It is not a de Polignac number, because 20388435 - 2³ = 20388427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20388396 and 20388405.

It is not an unprimeable number, because it can be changed into a prime (20388437) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9139 + ... + 11148.

It is an arithmetic number, because the mean of its divisors is an integer number (2069376).

Almost surely, 2^20388435 is an apocalyptic number.

20388435 is a deficient number, since it is larger than the sum of its proper divisors (12721581).

20388435 is a wasteful number, since it uses less digits than its factorization.

20388435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20362.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 20388435 is about 4515.3554677345. The cubic root of 20388435 is about 273.1877976310.

The spelling of 20388435 in words is "twenty million, three hundred eighty-eight thousand, four hundred thirty-five".