20401011403 has 4 divisors (see below), whose sum is σ = 20401364088. Its totient is φ = 20400658720.

The previous prime is 20401011391. The next prime is 20401011427. The reversal of 20401011403 is 30411010402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30411010402 = 2 ⋅15205505201.

It is a cyclic number.

It is not a de Polignac number, because 20401011403 - 2⁹ = 20401010891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20401015403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66958 + ... + 212803.

It is an arithmetic number, because the mean of its divisors is an integer number (5100341022).

Almost surely, 2^20401011403 is an apocalyptic number.

20401011403 is a deficient number, since it is larger than the sum of its proper divisors (352685).

20401011403 is an equidigital number, since it uses as much as digits as its factorization.

20401011403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352684.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20401011403 its reverse (30411010402), we get a palindrome (50812021805).

The spelling of 20401011403 in words is "twenty billion, four hundred one million, eleven thousand, four hundred three".