21674552194 has 8 divisors (see below), whose sum is σ = 32513176908. Its totient is φ = 10836826560.

The previous prime is 21674552191. The next prime is 21674552197. The reversal of 21674552194 is 49125547612.

It is an interprime number because it is at equal distance from previous prime (21674552191) and next prime (21674552197).

It can be written as a sum of positive squares in 2 ways, for example, as 20502516969 + 1172035225 = 143187^2 + 34235^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21674552191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160867 + ... + 263110.

Almost surely, 2^21674552194 is an apocalyptic number.

21674552194 is a deficient number, since it is larger than the sum of its proper divisors (10838624714).

21674552194 is a wasteful number, since it uses less digits than its factorization.

21674552194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449540.

The product of its digits is 604800, while the sum is 46.

The spelling of 21674552194 in words is "twenty-one billion, six hundred seventy-four million, five hundred fifty-two thousand, one hundred ninety-four".