29947157712 has 120 divisors (see below), whose sum is σ = 85466279808. Its totient is φ = 9787104000.

The previous prime is 29947157699. The next prime is 29947157729. The reversal of 29947157712 is 21775174992.

29947157712 is a `hidden beast` number, since 2 + 99 + 471 + 5 + 77 + 12 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1488037 + ... + 1508027.

Almost surely, 2^29947157712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29947157712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42733139904).

29947157712 is an abundant number, since it is smaller than the sum of its proper divisors (55519122096).

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

29947157712 is a wasteful number, since it uses less digits than its factorization.

29947157712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20209 (or 20200 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The spelling of 29947157712 in words is "twenty-nine billion, nine hundred forty-seven million, one hundred fifty-seven thousand, seven hundred twelve".