21031314234390 has 96 divisors (see below), whose sum is σ = 55346521557600. Its totient is φ = 5540250186240.

The previous prime is 21031314234389. The next prime is 21031314234421. The reversal of 21031314234390 is 9343241313012.

21031314234390 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 1 + 31 + 4 + 234 + 390 = 666.

It is a Curzon number.

It is a congruent number.

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, 7535596 + ... + 9942224.

It is an arithmetic number, because the mean of its divisors is an integer number (576526266225).

Almost surely, 2^{21031314234390} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21031314234390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27673260778800).

21031314234390 is an abundant number, since it is smaller than the sum of its proper divisors (34315207323210).

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

21031314234390 is a wasteful number, since it uses less digits than its factorization.

21031314234390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407822 (or 2407819 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 21031314234390 in words is "twenty-one trillion, thirty-one billion, three hundred fourteen million, two hundred thirty-four thousand, three hundred ninety".