29349772021 has 4 divisors (see below), whose sum is σ = 29560921600. Its totient is φ = 29138622444.

The previous prime is 29349772019. The next prime is 29349772031. The reversal of 29349772021 is 12027794392.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29349772021 - 2¹ = 29349772019 is a prime.

It is a super-2 number, since 2×29349772021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29349772031) 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, 105574581 + ... + 105574858.

It is an arithmetic number, because the mean of its divisors is an integer number (7390230400).

Almost surely, 2^29349772021 is an apocalyptic number.

It is an amenable number.

29349772021 is a deficient number, since it is larger than the sum of its proper divisors (211149579).

29349772021 is a wasteful number, since it uses less digits than its factorization.

29349772021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211149578.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 29349772021 in words is "twenty-nine billion, three hundred forty-nine million, seven hundred seventy-two thousand, twenty-one".