29955781297420 has 24 divisors (see below), whose sum is σ = 68625971700048. Its totient is φ = 10893011380800.

The previous prime is 29955781297399. The next prime is 29955781297439. The reversal of 29955781297420 is 2479218755992.

It is a self number, because there is not a number n which added to its sum of digits gives 29955781297420.

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 7 ways as a sum of consecutive naturals, for example, 68081320911 + ... + 68081321350.

It is an arithmetic number, because the mean of its divisors is an integer number (2859415487502).

Almost surely, 2^{29955781297420} is an apocalyptic number.

29955781297420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29955781297420 is an abundant number, since it is smaller than the sum of its proper divisors (38670190402628).

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

29955781297420 is a wasteful number, since it uses less digits than its factorization.

29955781297420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136162642281 (or 136162642279 counting only the distinct ones).

The product of its (nonzero) digits is 228614400, while the sum is 70.

The spelling of 29955781297420 in words is "twenty-nine trillion, nine hundred fifty-five billion, seven hundred eighty-one million, two hundred ninety-seven thousand, four hundred twenty".