21653064463502 has 4 divisors (see below), whose sum is σ = 32479596695256. Its totient is φ = 10826532231750.

The previous prime is 21653064463493. The next prime is 21653064463517. The reversal of 21653064463502 is 20536446035612.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5413266115874 + ... + 5413266115877.

It is an arithmetic number, because the mean of its divisors is an integer number (8119899173814).

Almost surely, 2^{21653064463502} is an apocalyptic number.

21653064463502 is a deficient number, since it is larger than the sum of its proper divisors (10826532231754).

21653064463502 is a wasteful number, since it uses less digits than its factorization.

21653064463502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10826532231753.

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 21653064463502 in words is "twenty-one trillion, six hundred fifty-three billion, sixty-four million, four hundred sixty-three thousand, five hundred two".