21437568326198 has 4 divisors (see below), whose sum is σ = 32156352489300. Its totient is φ = 10718784163098.

The previous prime is 21437568326173. The next prime is 21437568326243. The reversal of 21437568326198 is 89162386573412.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5359392081548 + ... + 5359392081551.

It is an arithmetic number, because the mean of its divisors is an integer number (8039088122325).

Almost surely, 2^{21437568326198} is an apocalyptic number.

21437568326198 is a deficient number, since it is larger than the sum of its proper divisors (10718784163102).

21437568326198 is a wasteful number, since it uses less digits than its factorization.

21437568326198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10718784163101.

The product of its digits is 104509440, while the sum is 65.

The spelling of 21437568326198 in words is "twenty-one trillion, four hundred thirty-seven billion, five hundred sixty-eight million, three hundred twenty-six thousand, one hundred ninety-eight".