29942623221 has 16 divisors (see below), whose sum is σ = 47200195200. Its totient is φ = 16520067648.

The previous prime is 29942623211. The next prime is 29942623261. The reversal of 29942623221 is 12232624992.

It is not a de Polignac number, because 29942623221 - 2¹³ = 29942615029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29942623211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24582826 + ... + 24584043.

It is an arithmetic number, because the mean of its divisors is an integer number (2950012200).

Almost surely, 2^29942623221 is an apocalyptic number.

29942623221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

29942623221 is a deficient number, since it is larger than the sum of its proper divisors (17257571979).

29942623221 is a wasteful number, since it uses less digits than its factorization.

29942623221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49166908.

The product of its digits is 186624, while the sum is 42.

The spelling of 29942623221 in words is "twenty-nine billion, nine hundred forty-two million, six hundred twenty-three thousand, two hundred twenty-one".