29997020784 has 20 divisors (see below), whose sum is σ = 77492303816. Its totient is φ = 9999006912.

The previous prime is 29997020737. The next prime is 29997020797. The reversal of 29997020784 is 48702079992.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312468919 + ... + 312469014.

Almost surely, 2^29997020784 is an apocalyptic number.

29997020784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

29997020784 is an abundant number, since it is smaller than the sum of its proper divisors (47495283032).

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

29997020784 is a wasteful number, since it uses less digits than its factorization.

29997020784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624937944 (or 624937938 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 29997020784 in words is "twenty-nine billion, nine hundred ninety-seven million, twenty thousand, seven hundred eighty-four".