16297421205 has 24 divisors (see below), whose sum is σ = 28236009888. Its totient is φ = 8023344576.

The previous prime is 16297421201. The next prime is 16297421219. The reversal of 16297421205 is 50212479261.

It is not a de Polignac number, because 16297421205 - 2² = 16297421201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16297421201) 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, 3211947 + ... + 3217016.

It is an arithmetic number, because the mean of its divisors is an integer number (1176500412).

Almost surely, 2^16297421205 is an apocalyptic number.

16297421205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16297421205 is a deficient number, since it is larger than the sum of its proper divisors (11938588683).

16297421205 is a wasteful number, since it uses less digits than its factorization.

16297421205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6428997 (or 6428984 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 16297421205 in words is "sixteen billion, two hundred ninety-seven million, four hundred twenty-one thousand, two hundred five".