21116140154644 has 24 divisors (see below), whose sum is σ = 37095753231488. Its totient is φ = 10517366436480.

The previous prime is 21116140154639. The next prime is 21116140154687. The reversal of 21116140154644 is 44645104161112.

It is a junction number, because it is equal to n+sod(n) for n = 21116140154597 and 21116140154606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4938844 + ... + 8162380.

Almost surely, 2^{21116140154644} is an apocalyptic number.

It is an amenable number.

21116140154644 is a deficient number, since it is larger than the sum of its proper divisors (15979613076844).

21116140154644 is a wasteful number, since it uses less digits than its factorization.

21116140154644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229855 (or 3229853 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 21116140154644 in words is "twenty-one trillion, one hundred sixteen billion, one hundred forty million, one hundred fifty-four thousand, six hundred forty-four".