29997500648820 has 48 divisors (see below), whose sum is σ = 83995607404800. Its totient is φ = 7999085355136.

The previous prime is 29997500648777. The next prime is 29997500648821. The reversal of 29997500648820 is 2884600579992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29997500648821) 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, 5800395 + ... + 9676754.

It is an arithmetic number, because the mean of its divisors is an integer number (1749908487600).

Almost surely, 2^{29997500648820} is an apocalyptic number.

29997500648820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29997500648820 is an abundant number, since it is smaller than the sum of its proper divisors (53998106755980).

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

29997500648820 is a wasteful number, since it uses less digits than its factorization.

29997500648820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15509464 (or 15509462 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 69.

The spelling of 29997500648820 in words is "twenty-nine trillion, nine hundred ninety-seven billion, five hundred million, six hundred forty-eight thousand, eight hundred twenty".