29997922687720 has 64 divisors (see below), whose sum is σ = 74460134604240. Its totient is φ = 10806005913600.

The previous prime is 29997922687717. The next prime is 29997922687763. The reversal of 29997922687720 is 2778622979992.

It can be written as a sum of positive squares in 8 ways, for example, as 1349458602244 + 28648464085476 = 1161662^2 + 5352426^2 .

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, 703494691 + ... + 703537330.

Almost surely, 2^{29997922687720} is an apocalyptic number.

29997922687720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29997922687720 is an abundant number, since it is smaller than the sum of its proper divisors (44462211916520).

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

29997922687720 is a wasteful number, since it uses less digits than its factorization.

29997922687720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407032086 (or 1407032082 counting only the distinct ones).

The product of its (nonzero) digits is 1728324864, while the sum is 79.

The spelling of 29997922687720 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred twenty-two million, six hundred eighty-seven thousand, seven hundred twenty".