21429490016 has 24 divisors (see below), whose sum is σ = 46024700904. Its totient is φ = 9740677120.

The previous prime is 21429489979. The next prime is 21429490031. The reversal of 21429490016 is 61009492412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30439265 + ... + 30439968.

It is an arithmetic number, because the mean of its divisors is an integer number (1917695871).

Almost surely, 2^21429490016 is an apocalyptic number.

It is an amenable number.

21429490016 is an abundant number, since it is smaller than the sum of its proper divisors (24595210888).

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

21429490016 is a wasteful number, since it uses less digits than its factorization.

21429490016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60879254 (or 60879246 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 21429490016 in words is "twenty-one billion, four hundred twenty-nine million, four hundred ninety thousand, sixteen".