29953311021 has 12 divisors (see below), whose sum is σ = 43273904700. Its totient is φ = 19965176640.

The previous prime is 29953311019. The next prime is 29953311029. The reversal of 29953311021 is 12011335992.

29953311021 is a `hidden beast` number, since 2 + 9 + 9 + 533 + 110 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13896873225 + 16056437796 = 117885^2 + 126714^2 .

It is not a de Polignac number, because 29953311021 - 2¹ = 29953311019 is a prime.

It is a super-2 number, since 2×29953311021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29953311029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256350 + ... + 354431.

It is an arithmetic number, because the mean of its divisors is an integer number (3606158725).

Almost surely, 2^29953311021 is an apocalyptic number.

It is an amenable number.

29953311021 is a deficient number, since it is larger than the sum of its proper divisors (13320593679).

29953311021 is a wasteful number, since it uses less digits than its factorization.

29953311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616236 (or 616233 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The spelling of 29953311021 in words is "twenty-nine billion, nine hundred fifty-three million, three hundred eleven thousand, twenty-one".