21798429404 has 12 divisors (see below), whose sum is σ = 38148418728. Its totient is φ = 10898881200.

The previous prime is 21798429379. The next prime is 21798429461. The reversal of 21798429404 is 40492489712.

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, 117419 + ... + 239549.

It is an arithmetic number, because the mean of its divisors is an integer number (3179034894).

Almost surely, 2^21798429404 is an apocalyptic number.

It is an amenable number.

21798429404 is a deficient number, since it is larger than the sum of its proper divisors (16349989324).

21798429404 is a wasteful number, since it uses less digits than its factorization.

21798429404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166756 (or 166754 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 21798429404 in words is "twenty-one billion, seven hundred ninety-eight million, four hundred twenty-nine thousand, four hundred four".