31423430020 has 48 divisors (see below), whose sum is σ = 69911372160. Its totient is φ = 11823148544.

The previous prime is 31423430011. The next prime is 31423430029. The reversal of 31423430020 is 2003432413.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31423430011) and next prime (31423430029).

It is a junction number, because it is equal to n+sod(n) for n = 31423429973 and 31423430000.

It is not an unprimeable number, because it can be changed into a prime (31423430029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581721 + ... + 633439.

It is an arithmetic number, because the mean of its divisors is an integer number (1456486920).

Almost surely, 2^31423430020 is an apocalyptic number.

It is an amenable number.

31423430020 is an abundant number, since it is smaller than the sum of its proper divisors (38487942140).

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

31423430020 is a wasteful number, since it uses less digits than its factorization.

31423430020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53532 (or 53530 counting only the distinct ones).

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

Adding to 31423430020 its reverse (2003432413), we get a palindrome (33426862433).

The spelling of 31423430020 in words is "thirty-one billion, four hundred twenty-three million, four hundred thirty thousand, twenty".