31422222020 has 48 divisors (see below), whose sum is σ = 75443114880. Its totient is φ = 10769078784.

The previous prime is 31422222011. The next prime is 31422222023. The reversal of 31422222020 is 2022222413.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31422221983 and 31422222001.

It is not an unprimeable number, because it can be changed into a prime (31422222023) 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, 322247 + ... + 408273.

It is an arithmetic number, because the mean of its divisors is an integer number (1571731560).

Almost surely, 2^31422222020 is an apocalyptic number.

It is an amenable number.

31422222020 is an abundant number, since it is smaller than the sum of its proper divisors (44020892860).

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

31422222020 is a wasteful number, since it uses less digits than its factorization.

31422222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88652 (or 88650 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 31422222020 its reverse (2022222413), we get a palindrome (33444444433).

The spelling of 31422222020 in words is "thirty-one billion, four hundred twenty-two million, two hundred twenty-two thousand, twenty".