21926349586 has 4 divisors (see below), whose sum is σ = 32889524382. Its totient is φ = 10963174792.

The previous prime is 21926349559. The next prime is 21926349611. The reversal of 21926349586 is 68594362912.

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

It can be written as a sum of positive squares in only one way, i.e., 20610909225 + 1315440361 = 143565^2 + 36269^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5481587395 + ... + 5481587398.

Almost surely, 2^21926349586 is an apocalyptic number.

21926349586 is a deficient number, since it is larger than the sum of its proper divisors (10963174796).

21926349586 is a wasteful number, since it uses less digits than its factorization.

21926349586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10963174795.

The product of its digits is 5598720, while the sum is 55.

The spelling of 21926349586 in words is "twenty-one billion, nine hundred twenty-six million, three hundred forty-nine thousand, five hundred eighty-six".