31234030020 has 36 divisors (see below), whose sum is σ = 94743224940. Its totient is φ = 8329074624.

The previous prime is 31234029997. The next prime is 31234030021. The reversal of 31234030020 is 2003043213.

31234030020 is a `hidden beast` number, since 3 + 1 + 2 + 340 + 300 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19761049476 + 11472980544 = 140574^2 + 107112^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×31234030020² (a number of 22 digits) contains 22 as substring.

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 = 31234029975 and 31234030002.

It is not an unprimeable number, because it can be changed into a prime (31234030021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86761015 + ... + 86761374.

Almost surely, 2^31234030020 is an apocalyptic number.

31234030020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31234030020 is an abundant number, since it is smaller than the sum of its proper divisors (63509194920).

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

31234030020 is a wasteful number, since it uses less digits than its factorization.

31234030020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173522404 (or 173522399 counting only the distinct ones).

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

Adding to 31234030020 its reverse (2003043213), we get a palindrome (33237073233).

The spelling of 31234030020 in words is "thirty-one billion, two hundred thirty-four million, thirty thousand, twenty".