31204243420000 has 480 divisors, whose sum is σ = 88909685593344. Its totient is φ = 10555564800000.

The previous prime is 31204243419991. The next prime is 31204243420001. The reversal of 31204243420000 is 2434240213.

It is a happy number.

It is a super-2 number, since 2×31204243420000² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31204243420001) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12328818735 + ... + 12328821265.

Almost surely, 2^{31204243420000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31204243420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44454842796672).

31204243420000 is an abundant number, since it is smaller than the sum of its proper divisors (57705442173344).

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

31204243420000 is a wasteful number, since it uses less digits than its factorization.

31204243420000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712 (or 3689 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 31204243420000 its reverse (2434240213), we get a palindrome (31206677660213).

The spelling of 31204243420000 in words is "thirty-one trillion, two hundred four billion, two hundred forty-three million, four hundred twenty thousand".