20401110073 has 4 divisors (see below), whose sum is σ = 20482389648. Its totient is φ = 20319830500.

The previous prime is 20401110071. The next prime is 20401110077. The reversal of 20401110073 is 37001110402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20401110073 - 2¹ = 20401110071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20401110073.

It is not an unprimeable number, because it can be changed into a prime (20401110071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40639411 + ... + 40639912.

It is an arithmetic number, because the mean of its divisors is an integer number (5120597412).

Almost surely, 2^20401110073 is an apocalyptic number.

It is an amenable number.

20401110073 is a deficient number, since it is larger than the sum of its proper divisors (81279575).

20401110073 is an equidigital number, since it uses as much as digits as its factorization.

20401110073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81279574.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 20401110073 its reverse (37001110402), we get a palindrome (57402220475).

The spelling of 20401110073 in words is "twenty billion, four hundred one million, one hundred ten thousand, seventy-three".