29420306891 has 4 divisors (see below), whose sum is σ = 29424518592. Its totient is φ = 29416095192.

The previous prime is 29420306887. The next prime is 29420306899. The reversal of 29420306891 is 19860302492.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 29420306891 - 2² = 29420306887 is a prime.

It is a super-3 number, since 3×29420306891³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29420306899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2095355 + ... + 2109348.

It is an arithmetic number, because the mean of its divisors is an integer number (7356129648).

Almost surely, 2^29420306891 is an apocalyptic number.

29420306891 is a deficient number, since it is larger than the sum of its proper divisors (4211701).

29420306891 is an equidigital number, since it uses as much as digits as its factorization.

29420306891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211700.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 29420306891 in words is "twenty-nine billion, four hundred twenty million, three hundred six thousand, eight hundred ninety-one".