31434420402 has 96 divisors (see below), whose sum is σ = 85693196160. Its totient is φ = 8089839360.

The previous prime is 31434420383. The next prime is 31434420461. The reversal of 31434420402 is 20402443413.

It is a happy number.

31434420402 is a `hidden beast` number, since 314 + 344 + 2 + 0 + 4 + 0 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47038 + ... + 255110.

It is an arithmetic number, because the mean of its divisors is an integer number (892637460).

Almost surely, 2^31434420402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31434420402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42846598080).

31434420402 is an abundant number, since it is smaller than the sum of its proper divisors (54258775758).

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

31434420402 is a wasteful number, since it uses less digits than its factorization.

31434420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208208 (or 208205 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 31434420402 its reverse (20402443413), we get a palindrome (51836863815).

The spelling of 31434420402 in words is "thirty-one billion, four hundred thirty-four million, four hundred twenty thousand, four hundred two".