20401101031431 has 16 divisors (see below), whose sum is σ = 28636080249600. Its totient is φ = 12883575716928.

The previous prime is 20401101031429. The next prime is 20401101031439. The reversal of 20401101031431 is 13413010110402.

It is not a de Polignac number, because 20401101031431 - 2¹ = 20401101031429 is a prime.

It is a super-2 number, since 2×20401101031431² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20401101031398 and 20401101031407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401101031439) 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, 17917851 + ... + 19022396.

It is an arithmetic number, because the mean of its divisors is an integer number (1789755015600).

Almost surely, 2^{20401101031431} is an apocalyptic number.

20401101031431 is a deficient number, since it is larger than the sum of its proper divisors (8234979218169).

20401101031431 is a wasteful number, since it uses less digits than its factorization.

20401101031431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36949958.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20401101031431 its reverse (13413010110402), we get a palindrome (33814111141833).

The spelling of 20401101031431 in words is "twenty trillion, four hundred one billion, one hundred one million, thirty-one thousand, four hundred thirty-one".