21326011622 has 4 divisors (see below), whose sum is σ = 31989017436. Its totient is φ = 10663005810.

The previous prime is 21326011621. The next prime is 21326011639. The reversal of 21326011622 is 22611062312.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21326011591 and 21326011600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21326011621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5331502904 + ... + 5331502907.

It is an arithmetic number, because the mean of its divisors is an integer number (7997254359).

Almost surely, 2^21326011622 is an apocalyptic number.

21326011622 is a deficient number, since it is larger than the sum of its proper divisors (10663005814).

21326011622 is a wasteful number, since it uses less digits than its factorization.

21326011622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10663005813.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 21326011622 its reverse (22611062312), we get a palindrome (43937073934).

The spelling of 21326011622 in words is "twenty-one billion, three hundred twenty-six million, eleven thousand, six hundred twenty-two".