21794187254 has 8 divisors (see below), whose sum is σ = 37361463888. Its totient is φ = 9340365960.

The previous prime is 21794187161. The next prime is 21794187281. The reversal of 21794187254 is 45278149712.

It is a happy number.

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

It is a congruent number.

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, 778363817 + ... + 778363844.

It is an arithmetic number, because the mean of its divisors is an integer number (4670182986).

Almost surely, 2^21794187254 is an apocalyptic number.

21794187254 is a deficient number, since it is larger than the sum of its proper divisors (15567276634).

21794187254 is a wasteful number, since it uses less digits than its factorization.

21794187254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556727670.

The product of its digits is 1128960, while the sum is 50.

The spelling of 21794187254 in words is "twenty-one billion, seven hundred ninety-four million, one hundred eighty-seven thousand, two hundred fifty-four".