29921997930 has 32 divisors (see below), whose sum is σ = 78341231808. Its totient is φ = 7253817600.

The previous prime is 29921997929. The next prime is 29921997967. The reversal of 29921997930 is 3979912992.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45336031 + ... + 45336690.

It is an arithmetic number, because the mean of its divisors is an integer number (2448163494).

Almost surely, 2^29921997930 is an apocalyptic number.

29921997930 is an abundant number, since it is smaller than the sum of its proper divisors (48419233878).

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

29921997930 is a wasteful number, since it uses less digits than its factorization.

29921997930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90672742.

The product of its (nonzero) digits is 4960116, while the sum is 60.

The spelling of 29921997930 in words is "twenty-nine billion, nine hundred twenty-one million, nine hundred ninety-seven thousand, nine hundred thirty".