21770067394 has 8 divisors (see below), whose sum is σ = 32656483728. Its totient is φ = 10884572820.

The previous prime is 21770067343. The next prime is 21770067419. The reversal of 21770067394 is 49376007712.

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, 168012 + ... + 267895.

It is an arithmetic number, because the mean of its divisors is an integer number (4082060466).

Almost surely, 2^21770067394 is an apocalyptic number.

21770067394 is a deficient number, since it is larger than the sum of its proper divisors (10886416334).

21770067394 is a wasteful number, since it uses less digits than its factorization.

21770067394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460880.

The product of its (nonzero) digits is 444528, while the sum is 46.

The spelling of 21770067394 in words is "twenty-one billion, seven hundred seventy million, sixty-seven thousand, three hundred ninety-four".