29543421924 has 81 divisors (see below), whose sum is σ = 77620700521. Its totient is φ = 9838525680.

The previous prime is 29543421913. The next prime is 29543421937. The reversal of 29543421924 is 42912434592.

The square root of 29543421924 is 171882.

It is a perfect power (a square), and thus also a powerful number.

29543421924 is a `hidden beast` number, since 29 + 5 + 434 + 2 + 192 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19455228324 + 10088193600 = 139482^2 + 100440^2 .

It is a tau number, because it is divible by the number of its divisors (81).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29543421924.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 27844354 + ... + 27845414.

Almost surely, 2^29543421924 is an apocalyptic number.

29543421924 is the 171882-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29543421924

29543421924 is an abundant number, since it is smaller than the sum of its proper divisors (48077278597).

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

29543421924 is an frugal number, since it uses more digits than its factorization.

29543421924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150 (or 1066 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 29543421924 in words is "twenty-nine billion, five hundred forty-three million, four hundred twenty-one thousand, nine hundred twenty-four".