30031021040 has 40 divisors (see below), whose sum is σ = 69829488960. Its totient is φ = 12011141376.

The previous prime is 30031020997. The next prime is 30031021043. The reversal of 30031021040 is 4012013003.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30031021043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1246226 + ... + 1270094.

It is an arithmetic number, because the mean of its divisors is an integer number (1745737224).

Almost surely, 2^30031021040 is an apocalyptic number.

It is an amenable number.

30031021040 is an abundant number, since it is smaller than the sum of its proper divisors (39798467920).

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

30031021040 is a wasteful number, since it uses less digits than its factorization.

30031021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39609 (or 39603 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 30031021040 its reverse (4012013003), we get a palindrome (34043034043).

The spelling of 30031021040 in words is "thirty billion, thirty-one million, twenty-one thousand, forty".