29747234821 has 2 divisors, whose sum is σ = 29747234822. Its totient is φ = 29747234820.

The previous prime is 29747234773. The next prime is 29747234827. The reversal of 29747234821 is 12843274792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18656828100 + 11090406721 = 136590^2 + 105311^2 .

It is a cyclic number.

It is not a de Polignac number, because 29747234821 - 2²³ = 29738846213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29747234827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14873617410 + 14873617411.

It is an arithmetic number, because the mean of its divisors is an integer number (14873617411).

Almost surely, 2^29747234821 is an apocalyptic number.

It is an amenable number.

29747234821 is a deficient number, since it is larger than the sum of its proper divisors (1).

29747234821 is an equidigital number, since it uses as much as digits as its factorization.

29747234821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 49.

The spelling of 29747234821 in words is "twenty-nine billion, seven hundred forty-seven million, two hundred thirty-four thousand, eight hundred twenty-one".