20420110 has 16 divisors (see below), whose sum is σ = 36925056. Its totient is φ = 8130528.

The previous prime is 20420107. The next prime is 20420119. The reversal of 20420110 is 1102402.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420119) 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 7 ways as a sum of consecutive naturals, for example, 2349 + ... + 6808.

It is an arithmetic number, because the mean of its divisors is an integer number (2307816).

Almost surely, 2^20420110 is an apocalyptic number.

20420110 is a deficient number, since it is larger than the sum of its proper divisors (16504946).

20420110 is a wasteful number, since it uses less digits than its factorization.

20420110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9387.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20420110 is about 4518.8615823015. The cubic root of 20420110 is about 273.3291971745.

Adding to 20420110 its reverse (1102402), we get a palindrome (21522512).

The spelling of 20420110 in words is "twenty million, four hundred twenty thousand, one hundred ten".