21626133272 has 64 divisors (see below), whose sum is σ = 42655757760. Its totient is φ = 10259251200.

The previous prime is 21626133251. The next prime is 21626133281. The reversal of 21626133272 is 27233162612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16370372 + ... + 16371692.

It is an arithmetic number, because the mean of its divisors is an integer number (666496215).

Almost surely, 2^21626133272 is an apocalyptic number.

It is an amenable number.

21626133272 is a deficient number, since it is larger than the sum of its proper divisors (21029624488).

21626133272 is a wasteful number, since it uses less digits than its factorization.

21626133272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004 (or 2000 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

Adding to 21626133272 its reverse (27233162612), we get a palindrome (48859295884).

The spelling of 21626133272 in words is "twenty-one billion, six hundred twenty-six million, one hundred thirty-three thousand, two hundred seventy-two".