20100342031 has 16 divisors (see below), whose sum is σ = 25108316928. Its totient is φ = 15632510400.

The previous prime is 20100342007. The next prime is 20100342043. The reversal of 20100342031 is 13024300102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20100342031 - 2²³ = 20091953423 is a prime.

It is a super-2 number, since 2×20100342031² (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 = 20100341996 and 20100342014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100342331) 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, 210405 + ... + 290638.

It is an arithmetic number, because the mean of its divisors is an integer number (1569269808).

Almost surely, 2^20100342031 is an apocalyptic number.

20100342031 is a deficient number, since it is larger than the sum of its proper divisors (5007974897).

20100342031 is a wasteful number, since it uses less digits than its factorization.

20100342031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501582.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20100342031 its reverse (13024300102), we get a palindrome (33124642133).

The spelling of 20100342031 in words is "twenty billion, one hundred million, three hundred forty-two thousand, thirty-one".