20420400110 has 32 divisors (see below), whose sum is σ = 40114801152. Its totient is φ = 7422533280.

The previous prime is 20420400107. The next prime is 20420400139. The reversal of 20420400110 is 1100402402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238247 + ... + 312413.

It is an arithmetic number, because the mean of its divisors is an integer number (1253587536).

Almost surely, 2^20420400110 is an apocalyptic number.

20420400110 is a deficient number, since it is larger than the sum of its proper divisors (19694401042).

20420400110 is a wasteful number, since it uses less digits than its factorization.

20420400110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76688.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20420400110 its reverse (1100402402), we get a palindrome (21520802512).

The spelling of 20420400110 in words is "twenty billion, four hundred twenty million, four hundred thousand, one hundred ten".