29967871820 has 48 divisors (see below), whose sum is σ = 63232904448. Its totient is φ = 11930043840.

The previous prime is 29967871811. The next prime is 29967871837. The reversal of 29967871820 is 2817876992.

It is a super-2 number, since 2×29967871820² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 29967871820.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5357225 + ... + 5362815.

It is an arithmetic number, because the mean of its divisors is an integer number (1317352176).

Almost surely, 2^29967871820 is an apocalyptic number.

29967871820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29967871820 is an abundant number, since it is smaller than the sum of its proper divisors (33265032628).

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

29967871820 is a wasteful number, since it uses less digits than its factorization.

29967871820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6830 (or 6828 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 59.

The spelling of 29967871820 in words is "twenty-nine billion, nine hundred sixty-seven million, eight hundred seventy-one thousand, eight hundred twenty".