31233000420 has 72 divisors (see below), whose sum is σ = 98859249216. Its totient is φ = 7966677312.

The previous prime is 31233000419. The next prime is 31233000427. The reversal of 31233000420 is 2400033213.

31233000420 is a `hidden beast` number, since 312 + 330 + 0 + 0 + 4 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31233000393 and 31233000402.

It is not an unprimeable number, because it can be changed into a prime (31233000427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3767962 + ... + 3776241.

It is an arithmetic number, because the mean of its divisors is an integer number (1373045128).

Almost surely, 2^31233000420 is an apocalyptic number.

31233000420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31233000420 is an abundant number, since it is smaller than the sum of its proper divisors (67626248796).

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

31233000420 is a wasteful number, since it uses less digits than its factorization.

31233000420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7544241 (or 7544236 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 31233000420 its reverse (2400033213), we get a palindrome (33633033633).

The spelling of 31233000420 in words is "thirty-one billion, two hundred thirty-three million, four hundred twenty", and thus it is an aban number.