30705463920 has 160 divisors (see below), whose sum is σ = 101138794560. Its totient is φ = 7706173440.

The previous prime is 30705463883. The next prime is 30705463939. The reversal of 30705463920 is 2936450703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1166100 + ... + 1192140.

It is an arithmetic number, because the mean of its divisors is an integer number (632117466).

Almost surely, 2^30705463920 is an apocalyptic number.

30705463920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30705463920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50569397280).

30705463920 is an abundant number, since it is smaller than the sum of its proper divisors (70433330640).

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

30705463920 is a wasteful number, since it uses less digits than its factorization.

30705463920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26108 (or 26068 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 39.

The spelling of 30705463920 in words is "thirty billion, seven hundred five million, four hundred sixty-three thousand, nine hundred twenty".