20340430031 has 16 divisors (see below), whose sum is σ = 22308720000. Its totient is φ = 18471481056.

The previous prime is 20340430007. The next prime is 20340430043. The reversal of 20340430031 is 13003404302.

It is a cyclic number.

It is not a de Polignac number, because 20340430031 - 2¹⁰ = 20340429007 is a prime.

It is a super-2 number, since 2×20340430031² (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 = 20340429985 and 20340430012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340430931) 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, 56201 + ... + 209378.

It is an arithmetic number, because the mean of its divisors is an integer number (1394295000).

Almost surely, 2^20340430031 is an apocalyptic number.

20340430031 is a deficient number, since it is larger than the sum of its proper divisors (1968289969).

20340430031 is a wasteful number, since it uses less digits than its factorization.

20340430031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265766.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20340430031 its reverse (13003404302), we get a palindrome (33343834333).

The spelling of 20340430031 in words is "twenty billion, three hundred forty million, four hundred thirty thousand, thirty-one".