31330204434 has 128 divisors (see below), whose sum is σ = 75881318400. Its totient is φ = 9541877760.

The previous prime is 31330204393. The next prime is 31330204439. The reversal of 31330204434 is 43440203313.

31330204434 is a `hidden beast` number, since 313 + 302 + 0 + 4 + 43 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31330204398 and 31330204407.

It is not an unprimeable number, because it can be changed into a prime (31330204439) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21771487 + ... + 21772925.

It is an arithmetic number, because the mean of its divisors is an integer number (592822800).

Almost surely, 2^31330204434 is an apocalyptic number.

31330204434 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31330204434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37940659200).

31330204434 is an abundant number, since it is smaller than the sum of its proper divisors (44551113966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31330204434 is a wasteful number, since it uses less digits than its factorization.

31330204434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 31330204434 its reverse (43440203313), we get a palindrome (74770407747).

The spelling of 31330204434 in words is "thirty-one billion, three hundred thirty million, two hundred four thousand, four hundred thirty-four".