31400218068 has 24 divisors (see below), whose sum is σ = 73915560768. Its totient is φ = 10374112896.

The previous prime is 31400218063. The next prime is 31400218111. The reversal of 31400218068 is 86081200413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400218063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11576896 + ... + 11579607.

It is an arithmetic number, because the mean of its divisors is an integer number (3079815032).

Almost surely, 2^31400218068 is an apocalyptic number.

It is an amenable number.

31400218068 is an abundant number, since it is smaller than the sum of its proper divisors (42515342700).

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

31400218068 is a wasteful number, since it uses less digits than its factorization.

31400218068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23156623 (or 23156621 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 31400218068 in words is "thirty-one billion, four hundred million, two hundred eighteen thousand, sixty-eight".