21929966007 has 8 divisors (see below), whose sum is σ = 29247744240. Its totient is φ = 14616082560.

The previous prime is 21929965961. The next prime is 21929966011. The reversal of 21929966007 is 70066992912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21929966007 - 2⁸ = 21929965751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21929966407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960532 + ... + 983097.

It is an arithmetic number, because the mean of its divisors is an integer number (3655968030).

Almost surely, 2^21929966007 is an apocalyptic number.

21929966007 is a deficient number, since it is larger than the sum of its proper divisors (7317778233).

21929966007 is a wasteful number, since it uses less digits than its factorization.

21929966007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947393.

The product of its (nonzero) digits is 734832, while the sum is 51.

The spelling of 21929966007 in words is "twenty-one billion, nine hundred twenty-nine million, nine hundred sixty-six thousand, seven".