30905521420 has 12 divisors (see below), whose sum is σ = 64901595024. Its totient is φ = 12362208560.

The previous prime is 30905521403. The next prime is 30905521421. The reversal of 30905521420 is 2412550903.

It is not an unprimeable number, because it can be changed into a prime (30905521421) 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, 772638016 + ... + 772638055.

It is an arithmetic number, because the mean of its divisors is an integer number (5408466252).

Almost surely, 2^30905521420 is an apocalyptic number.

It is an amenable number.

30905521420 is an abundant number, since it is smaller than the sum of its proper divisors (33996073604).

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

30905521420 is a wasteful number, since it uses less digits than its factorization.

30905521420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545276080 (or 1545276078 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 30905521420 in words is "thirty billion, nine hundred five million, five hundred twenty-one thousand, four hundred twenty".