21263074654 has 32 divisors (see below), whose sum is σ = 33330825216. Its totient is φ = 10161819360.

The previous prime is 21263074607. The next prime is 21263074663. The reversal of 21263074654 is 45647036212.

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, 2531049 + ... + 2539435.

It is an arithmetic number, because the mean of its divisors is an integer number (1041588288).

Almost surely, 2^21263074654 is an apocalyptic number.

21263074654 is a deficient number, since it is larger than the sum of its proper divisors (12067750562).

21263074654 is a wasteful number, since it uses less digits than its factorization.

21263074654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8920.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 21263074654 in words is "twenty-one billion, two hundred sixty-three million, seventy-four thousand, six hundred fifty-four".