21546106012 has 12 divisors (see below), whose sum is σ = 37710062320. Its totient is φ = 10771802496.

The previous prime is 21546106007. The next prime is 21546106013. The reversal of 21546106012 is 21060164512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21546106013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273312 + ... + 343207.

Almost surely, 2^21546106012 is an apocalyptic number.

It is an amenable number.

21546106012 is a deficient number, since it is larger than the sum of its proper divisors (16163956308).

21546106012 is a wasteful number, since it uses less digits than its factorization.

21546106012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625260 (or 625258 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 21546106012 in words is "twenty-one billion, five hundred forty-six million, one hundred six thousand, twelve".