20401011031 has 16 divisors (see below), whose sum is σ = 21657636000. Its totient is φ = 19183909248.

The previous prime is 20401011023. The next prime is 20401011077. The reversal of 20401011031 is 13011010402.

It is not a de Polignac number, because 20401011031 - 2³ = 20401011023 is a prime.

It is a super-2 number, since 2×20401011031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401011011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411765 + ... + 458641.

It is an arithmetic number, because the mean of its divisors is an integer number (1353602250).

Almost surely, 2^20401011031 is an apocalyptic number.

20401011031 is a deficient number, since it is larger than the sum of its proper divisors (1256624969).

20401011031 is a wasteful number, since it uses less digits than its factorization.

20401011031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47298.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20401011031 its reverse (13011010402), we get a palindrome (33412021433).

The spelling of 20401011031 in words is "twenty billion, four hundred one million, eleven thousand, thirty-one".