31423214020 has 192 divisors, whose sum is σ = 74730491136. Its totient is φ = 11003166720.

The previous prime is 31423213999. The next prime is 31423214021. The reversal of 31423214020 is 2041232413.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 31423213982 and 31423214000.

It is not an unprimeable number, because it can be changed into a prime (31423214021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 200147782 + ... + 200147938.

It is an arithmetic number, because the mean of its divisors is an integer number (389221308).

Almost surely, 2^31423214020 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 31423214020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37365245568).

31423214020 is an abundant number, since it is smaller than the sum of its proper divisors (43307277116).

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

31423214020 is a wasteful number, since it uses less digits than its factorization.

31423214020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31423214020 its reverse (2041232413), we get a palindrome (33464446433).

The spelling of 31423214020 in words is "thirty-one billion, four hundred twenty-three million, two hundred fourteen thousand, twenty".