21627782612 has 12 divisors (see below), whose sum is σ = 39840652320. Its totient is φ = 10244739096.

The previous prime is 21627782591. The next prime is 21627782621. The reversal of 21627782612 is 21628772612.

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, 142287968 + ... + 142288119.

It is an arithmetic number, because the mean of its divisors is an integer number (3320054360).

Almost surely, 2^21627782612 is an apocalyptic number.

It is an amenable number.

21627782612 is a deficient number, since it is larger than the sum of its proper divisors (18212869708).

21627782612 is a wasteful number, since it uses less digits than its factorization.

21627782612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284576110 (or 284576108 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The spelling of 21627782612 in words is "twenty-one billion, six hundred twenty-seven million, seven hundred eighty-two thousand, six hundred twelve".