21374465199 has 16 divisors (see below), whose sum is σ = 29029587840. Its totient is φ = 13986937440.

The previous prime is 21374465173. The next prime is 21374465221. The reversal of 21374465199 is 99156447312.

It is a happy number.

It is not a de Polignac number, because 21374465199 - 2¹¹ = 21374463151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374465129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270457 + ... + 340434.

It is an arithmetic number, because the mean of its divisors is an integer number (1814349240).

Almost surely, 2^21374465199 is an apocalyptic number.

21374465199 is a deficient number, since it is larger than the sum of its proper divisors (7655122641).

21374465199 is a wasteful number, since it uses less digits than its factorization.

21374465199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611110.

The product of its digits is 1632960, while the sum is 51.

The spelling of 21374465199 in words is "twenty-one billion, three hundred seventy-four million, four hundred sixty-five thousand, one hundred ninety-nine".