21236000654 has 16 divisors (see below), whose sum is σ = 34844518656. Its totient is φ = 9626422200.

The previous prime is 21236000633. The next prime is 21236000713. The reversal of 21236000654 is 45600063212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1307012 + ... + 1323159.

It is an arithmetic number, because the mean of its divisors is an integer number (2177782416).

Almost surely, 2^21236000654 is an apocalyptic number.

21236000654 is a deficient number, since it is larger than the sum of its proper divisors (13608518002).

21236000654 is a wasteful number, since it uses less digits than its factorization.

21236000654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630551.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 21236000654 its reverse (45600063212), we get a palindrome (66836063866).

The spelling of 21236000654 in words is "twenty-one billion, two hundred thirty-six million, six hundred fifty-four", and thus it is an aban number.