20401401031 has 32 divisors (see below), whose sum is σ = 23937638400. Its totient is φ = 17191802880.

The previous prime is 20401401019. The next prime is 20401401037. The reversal of 20401401031 is 13010410402.

It is a cyclic number.

It is not a de Polignac number, because 20401401031 - 2²¹ = 20399303879 is a prime.

It is a super-2 number, since 2×20401401031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20401400996 and 20401401014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401401037) 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 31 ways as a sum of consecutive naturals, for example, 1932375 + ... + 1942903.

It is an arithmetic number, because the mean of its divisors is an integer number (748051200).

Almost surely, 2^20401401031 is an apocalyptic number.

20401401031 is a deficient number, since it is larger than the sum of its proper divisors (3536237369).

20401401031 is a wasteful number, since it uses less digits than its factorization.

20401401031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10759.

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

Adding to 20401401031 its reverse (13010410402), we get a palindrome (33411811433).

The spelling of 20401401031 in words is "twenty billion, four hundred one million, four hundred one thousand, thirty-one".