31003212018 has 64 divisors (see below), whose sum is σ = 66721812480. Its totient is φ = 9568876800.

The previous prime is 31003212017. The next prime is 31003212029. The reversal of 31003212018 is 81021230013.

It is a super-2 number, since 2×31003212018² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31003211985 and 31003212003.

It is not an unprimeable number, because it can be changed into a prime (31003212017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3551463 + ... + 3560181.

It is an arithmetic number, because the mean of its divisors is an integer number (1042528320).

Almost surely, 2^31003212018 is an apocalyptic number.

31003212018 is an abundant number, since it is smaller than the sum of its proper divisors (35718600462).

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

31003212018 is a wasteful number, since it uses less digits than its factorization.

31003212018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9303.

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 31003212018 in words is "thirty-one billion, three million, two hundred twelve thousand, eighteen".