29870522381 has 4 divisors (see below), whose sum is σ = 34137739872. Its totient is φ = 25603304892.

The previous prime is 29870522369. The next prime is 29870522387. The reversal of 29870522381 is 18322507892.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29870522381 - 2¹⁴ = 29870505997 is a prime.

It is a super-2 number, since 2×29870522381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29870522387) 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, 2133608735 + ... + 2133608748.

It is an arithmetic number, because the mean of its divisors is an integer number (8534434968).

Almost surely, 2^29870522381 is an apocalyptic number.

It is an amenable number.

29870522381 is a deficient number, since it is larger than the sum of its proper divisors (4267217491).

29870522381 is an equidigital number, since it uses as much as digits as its factorization.

29870522381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4267217490.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 29870522381 in words is "twenty-nine billion, eight hundred seventy million, five hundred twenty-two thousand, three hundred eighty-one".