21757103194 has 8 divisors (see below), whose sum is σ = 32640889428. Its totient is φ = 10876806720.

The previous prime is 21757103153. The next prime is 21757103227. The reversal of 21757103194 is 49130175712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20004424969 + 1752678225 = 141437^2 + 41865^2 .

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

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, 856797 + ... + 881824.

Almost surely, 2^21757103194 is an apocalyptic number.

21757103194 is a deficient number, since it is larger than the sum of its proper divisors (10883786234).

21757103194 is a wasteful number, since it uses less digits than its factorization.

21757103194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744880.

The product of its (nonzero) digits is 52920, while the sum is 40.

The spelling of 21757103194 in words is "twenty-one billion, seven hundred fifty-seven million, one hundred three thousand, one hundred ninety-four".