20103540631 has 16 divisors (see below), whose sum is σ = 21123698400. Its totient is φ = 19107117568.

The previous prime is 20103540593. The next prime is 20103540647. The reversal of 20103540631 is 13604530102.

It is a cyclic number.

It is not a de Polignac number, because 20103540631 - 2⁷ = 20103540503 is a prime.

It is a super-2 number, since 2×20103540631² (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 = 20103540596 and 20103540605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103540031) 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, 568731 + ... + 603043.

It is an arithmetic number, because the mean of its divisors is an integer number (1320231150).

Almost surely, 2^20103540631 is an apocalyptic number.

20103540631 is a deficient number, since it is larger than the sum of its proper divisors (1020157769).

20103540631 is a wasteful number, since it uses less digits than its factorization.

20103540631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34658.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 20103540631 in words is "twenty billion, one hundred three million, five hundred forty thousand, six hundred thirty-one".