31473229889920 has 768 divisors, whose sum is σ = 102419870515200. Its totient is φ = 9132034867200.

The previous prime is 31473229889891. The next prime is 31473229889953. The reversal of 31473229889920 is 2998892237413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 240057985 + ... + 240189055.

It is an arithmetic number, because the mean of its divisors is an integer number (133359206400).

Almost surely, 2^{31473229889920} 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 31473229889920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51209935257600).

31473229889920 is an abundant number, since it is smaller than the sum of its proper divisors (70946640625280).

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

31473229889920 is a wasteful number, since it uses less digits than its factorization.

31473229889920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131167 (or 131148 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 67.

The spelling of 31473229889920 in words is "thirty-one trillion, four hundred seventy-three billion, two hundred twenty-nine million, eight hundred eighty-nine thousand, nine hundred twenty".