21154006306 has 16 divisors (see below), whose sum is σ = 32143535424. Its totient is φ = 10440164304.

The previous prime is 21154006273. The next prime is 21154006351. The reversal of 21154006306 is 60360045112.

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, 104005 + ... + 230488.

It is an arithmetic number, because the mean of its divisors is an integer number (2008970964).

Almost surely, 2^21154006306 is an apocalyptic number.

21154006306 is a deficient number, since it is larger than the sum of its proper divisors (10989529118).

21154006306 is a wasteful number, since it uses less digits than its factorization.

21154006306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334905.

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 21154006306 in words is "twenty-one billion, one hundred fifty-four million, six thousand, three hundred six".