29172066420 has 96 divisors (see below), whose sum is σ = 93392990208. Its totient is φ = 6664874112.

The previous prime is 29172066397. The next prime is 29172066421. The reversal of 29172066420 is 2466027192.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29172066421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 986287 + ... + 1015433.

It is an arithmetic number, because the mean of its divisors is an integer number (972843648).

Almost surely, 2^29172066420 is an apocalyptic number.

29172066420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29172066420 is an abundant number, since it is smaller than the sum of its proper divisors (64220923788).

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

29172066420 is a wasteful number, since it uses less digits than its factorization.

29172066420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31549 (or 31547 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 29172066420 in words is "twenty-nine billion, one hundred seventy-two million, sixty-six thousand, four hundred twenty".