29021905920 has 352 divisors, whose sum is σ = 108361433088. Its totient is φ = 6491308032.

The previous prime is 29021905909. The next prime is 29021905937. The reversal of 29021905920 is 2950912092.

It is a super-3 number, since 3×29021905920³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5050569 + ... + 5056311.

Almost surely, 2^29021905920 is an apocalyptic number.

29021905920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29021905920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54180716544).

29021905920 is an abundant number, since it is smaller than the sum of its proper divisors (79339527168).

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

29021905920 is a wasteful number, since it uses less digits than its factorization.

29021905920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825 (or 5807 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The spelling of 29021905920 in words is "twenty-nine billion, twenty-one million, nine hundred five thousand, nine hundred twenty".