21761846398 has 16 divisors (see below), whose sum is σ = 32780887920. Its totient is φ = 10834978176.

The previous prime is 21761846377. The next prime is 21761846411. The reversal of 21761846398 is 89364816712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447733 + ... + 493951.

It is an arithmetic number, because the mean of its divisors is an integer number (2048805495).

Almost surely, 2^21761846398 is an apocalyptic number.

21761846398 is a deficient number, since it is larger than the sum of its proper divisors (11019041522).

21761846398 is a wasteful number, since it uses less digits than its factorization.

21761846398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47211.

The product of its digits is 3483648, while the sum is 55.

The spelling of 21761846398 in words is "twenty-one billion, seven hundred sixty-one million, eight hundred forty-six thousand, three hundred ninety-eight".