31423223020 has 48 divisors (see below), whose sum is σ = 76162459968. Its totient is φ = 10667001600.

The previous prime is 31423223003. The next prime is 31423223071. The reversal of 31423223020 is 2032232413.

It is a junction number, because it is equal to n+sod(n) for n = 31423222982 and 31423223000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1097007 + ... + 1125286.

It is an arithmetic number, because the mean of its divisors is an integer number (1586717916).

Almost surely, 2^31423223020 is an apocalyptic number.

It is an amenable number.

31423223020 is an abundant number, since it is smaller than the sum of its proper divisors (44739236948).

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

31423223020 is a wasteful number, since it uses less digits than its factorization.

31423223020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222410 (or 2222408 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 31423223020 its reverse (2032232413), we get a palindrome (33455455433).

The spelling of 31423223020 in words is "thirty-one billion, four hundred twenty-three million, two hundred twenty-three thousand, twenty".