21116144156 has 12 divisors (see below), whose sum is σ = 37421015520. Its totient is φ = 10424425440.

The previous prime is 21116144111. The next prime is 21116144167. The reversal of 21116144156 is 65144161112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33411305 + ... + 33411936.

It is an arithmetic number, because the mean of its divisors is an integer number (3118417960).

Almost surely, 2^21116144156 is an apocalyptic number.

It is an amenable number.

21116144156 is a deficient number, since it is larger than the sum of its proper divisors (16304871364).

21116144156 is a wasteful number, since it uses less digits than its factorization.

21116144156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66823324 (or 66823322 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The spelling of 21116144156 in words is "twenty-one billion, one hundred sixteen million, one hundred forty-four thousand, one hundred fifty-six".