29316969621 has 12 divisors (see below), whose sum is σ = 42566149548. Its totient is φ = 19443377664.

The previous prime is 29316969593. The next prime is 29316969629. The reversal of 29316969621 is 12696961392.

29316969621 is a `hidden beast` number, since 2 + 9 + 3 + 1 + 6 + 9 + 6 + 9 + 621 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20421839025 + 8895130596 = 142905^2 + 94314^2 .

It is not a de Polignac number, because 29316969621 - 2²⁹ = 28780098709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29316969629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8437230 + ... + 8440703.

It is an arithmetic number, because the mean of its divisors is an integer number (3547179129).

Almost surely, 2^29316969621 is an apocalyptic number.

It is an amenable number.

29316969621 is a deficient number, since it is larger than the sum of its proper divisors (13249179927).

29316969621 is a wasteful number, since it uses less digits than its factorization.

29316969621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16878132 (or 16878129 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The spelling of 29316969621 in words is "twenty-nine billion, three hundred sixteen million, nine hundred sixty-nine thousand, six hundred twenty-one".