21838535522 has 4 divisors (see below), whose sum is σ = 32757803286. Its totient is φ = 10919267760.

The previous prime is 21838535507. The next prime is 21838535531. The reversal of 21838535522 is 22553583812.

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., 20323068481 + 1515467041 = 142559^2 + 38929^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5459633879 + ... + 5459633882.

Almost surely, 2^21838535522 is an apocalyptic number.

21838535522 is a deficient number, since it is larger than the sum of its proper divisors (10919267764).

21838535522 is a wasteful number, since it uses less digits than its factorization.

21838535522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10919267763.

The product of its digits is 576000, while the sum is 44.

The spelling of 21838535522 in words is "twenty-one billion, eight hundred thirty-eight million, five hundred thirty-five thousand, five hundred twenty-two".