21703265654 has 16 divisors (see below), whose sum is σ = 37231488000. Its totient is φ = 9294927144.

The previous prime is 21703265653. The next prime is 21703265693. The reversal of 21703265654 is 45656230712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21703265653) by changing a digit.

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, 518504 + ... + 558795.

It is an arithmetic number, because the mean of its divisors is an integer number (2326968000).

Almost surely, 2^21703265654 is an apocalyptic number.

21703265654 is a deficient number, since it is larger than the sum of its proper divisors (15528222346).

21703265654 is a wasteful number, since it uses less digits than its factorization.

21703265654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078747.

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 21703265654 in words is "twenty-one billion, seven hundred three million, two hundred sixty-five thousand, six hundred fifty-four".