21678007682 has 16 divisors (see below), whose sum is σ = 33531293952. Its totient is φ = 10505388000.

The previous prime is 21678007667. The next prime is 21678007693. The reversal of 21678007682 is 28670087612.

It is a Harshad number since it is a multiple of its sum of digits (47).

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, 1109819 + ... + 1129182.

It is an arithmetic number, because the mean of its divisors is an integer number (2095705872).

Almost surely, 2^21678007682 is an apocalyptic number.

21678007682 is a deficient number, since it is larger than the sum of its proper divisors (11853286270).

21678007682 is a wasteful number, since it uses less digits than its factorization.

21678007682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239153.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 21678007682 in words is "twenty-one billion, six hundred seventy-eight million, seven thousand, six hundred eighty-two".