21386546146 has 16 divisors (see below), whose sum is σ = 37126736640. Its totient is φ = 9049641120.

The previous prime is 21386546107. The next prime is 21386546149. The reversal of 21386546146 is 64164568312.

It is a junction number, because it is equal to n+sod(n) for n = 21386546096 and 21386546105.

It is not an unprimeable number, because it can be changed into a prime (21386546149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9667315 + ... + 9669526.

It is an arithmetic number, because the mean of its divisors is an integer number (2320421040).

Almost surely, 2^21386546146 is an apocalyptic number.

21386546146 is a deficient number, since it is larger than the sum of its proper divisors (15740190494).

21386546146 is a wasteful number, since it uses less digits than its factorization.

21386546146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19336929.

The product of its digits is 829440, while the sum is 46.

The spelling of 21386546146 in words is "twenty-one billion, three hundred eighty-six million, five hundred forty-six thousand, one hundred forty-six".