21307455154 has 8 divisors (see below), whose sum is σ = 31962926448. Its totient is φ = 10653146340.

The previous prime is 21307455151. The next prime is 21307455167. The reversal of 21307455154 is 45155470312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21307455151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243252 + ... + 319039.

It is an arithmetic number, because the mean of its divisors is an integer number (3995365806).

Almost surely, 2^21307455154 is an apocalyptic number.

21307455154 is a deficient number, since it is larger than the sum of its proper divisors (10655471294).

21307455154 is a wasteful number, since it uses less digits than its factorization.

21307455154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581240.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 21307455154 in words is "twenty-one billion, three hundred seven million, four hundred fifty-five thousand, one hundred fifty-four".