31431340026 has 96 divisors (see below), whose sum is σ = 73227236160. Its totient is φ = 9714152448.

The previous prime is 31431340021. The next prime is 31431340027. The reversal of 31431340026 is 62004313413.

31431340026 is a `hidden beast` number, since 314 + 3 + 1 + 340 + 0 + 2 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (31431340021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3593130 + ... + 3601866.

It is an arithmetic number, because the mean of its divisors is an integer number (762783710).

Almost surely, 2^31431340026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31431340026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36613618080).

31431340026 is an abundant number, since it is smaller than the sum of its proper divisors (41795896134).

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

31431340026 is a wasteful number, since it uses less digits than its factorization.

31431340026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8988 (or 8985 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 31431340026 its reverse (62004313413), we get a palindrome (93435653439).

The spelling of 31431340026 in words is "thirty-one billion, four hundred thirty-one million, three hundred forty thousand, twenty-six".