30321657040 has 20 divisors (see below), whose sum is σ = 70497852804. Its totient is φ = 12128662784.

The previous prime is 30321657017. The next prime is 30321657043. The reversal of 30321657040 is 4075612303.

It can be written as a sum of positive squares in 2 ways, for example, as 24090764944 + 6230892096 = 155212^2 + 78936^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 30321656993 and 30321657011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30321657043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189510277 + ... + 189510436.

Almost surely, 2^30321657040 is an apocalyptic number.

It is an amenable number.

30321657040 is an abundant number, since it is smaller than the sum of its proper divisors (40176195764).

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

30321657040 is a wasteful number, since it uses less digits than its factorization.

30321657040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379020726 (or 379020720 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The spelling of 30321657040 in words is "thirty billion, three hundred twenty-one million, six hundred fifty-seven thousand, forty".