29950687921 has 24 divisors (see below), whose sum is σ = 38018471040. Its totient is φ = 23331722400.

The previous prime is 29950687909. The next prime is 29950687967. The reversal of 29950687921 is 12978605992.

It is not a de Polignac number, because 29950687921 - 2²⁹ = 29413817009 is a prime.

It is a super-2 number, since 2×29950687921² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29950687021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3089560 + ... + 3099238.

It is an arithmetic number, because the mean of its divisors is an integer number (1584102960).

Almost surely, 2^29950687921 is an apocalyptic number.

It is an amenable number.

29950687921 is a deficient number, since it is larger than the sum of its proper divisors (8067783119).

29950687921 is a wasteful number, since it uses less digits than its factorization.

29950687921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15445 (or 15438 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 29950687921 in words is "twenty-nine billion, nine hundred fifty million, six hundred eighty-seven thousand, nine hundred twenty-one".