29997311922 has 18 divisors (see below), whose sum is σ = 64995767967. Its totient is φ = 9998859036.

The previous prime is 29997311887. The next prime is 29997311923. The reversal of 29997311922 is 22911379992.

It can be written as a sum of positive squares in only one way, i.e., 14998655961 + 14998655961 = 122469^2 + 122469^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=122469.

It is not an unprimeable number, because it can be changed into a prime (29997311923) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 714403 + ... + 755225.

Almost surely, 2^29997311922 is an apocalyptic number.

29997311922 is an abundant number, since it is smaller than the sum of its proper divisors (34998456045).

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

29997311922 is an frugal number, since it uses more digits than its factorization.

29997311922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81654 (or 40828 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The spelling of 29997311922 in words is "twenty-nine billion, nine hundred ninety-seven million, three hundred eleven thousand, nine hundred twenty-two".