21674174913 has 16 divisors (see below), whose sum is σ = 33505971840. Its totient is φ = 13821212592.

The previous prime is 21674174881. The next prime is 21674174917. The reversal of 21674174913 is 31947147612.

It is a happy number.

21674174913 is a `hidden beast` number, since 216 + 7 + 417 + 4 + 9 + 13 = 666.

It is not a de Polignac number, because 21674174913 - 2⁵ = 21674174881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21674174917) 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, 17450406 + ... + 17451647.

It is an arithmetic number, because the mean of its divisors is an integer number (2094123240).

Almost surely, 2^21674174913 is an apocalyptic number.

21674174913 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21674174913 is a deficient number, since it is larger than the sum of its proper divisors (11831796927).

21674174913 is a wasteful number, since it uses less digits than its factorization.

21674174913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34902085 (or 34902079 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The spelling of 21674174913 in words is "twenty-one billion, six hundred seventy-four million, one hundred seventy-four thousand, nine hundred thirteen".