21514617772 has 48 divisors (see below), whose sum is σ = 41011250112. Its totient is φ = 9847284480.

The previous prime is 21514617769. The next prime is 21514617779. The reversal of 21514617772 is 27771641512.

It is not an unprimeable number, because it can be changed into a prime (21514617779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155838 + ... + 259450.

It is an arithmetic number, because the mean of its divisors is an integer number (854401044).

Almost surely, 2^21514617772 is an apocalyptic number.

It is an amenable number.

21514617772 is a deficient number, since it is larger than the sum of its proper divisors (19496632340).

21514617772 is a wasteful number, since it uses less digits than its factorization.

21514617772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103738 (or 103736 counting only the distinct ones).

The product of its digits is 164640, while the sum is 43.

The spelling of 21514617772 in words is "twenty-one billion, five hundred fourteen million, six hundred seventeen thousand, seven hundred seventy-two".