21466715154 has 8 divisors (see below), whose sum is σ = 42933430320. Its totient is φ = 7155571716.

The previous prime is 21466715113. The next prime is 21466715159. The reversal of 21466715154 is 45151766412.

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

21466715154 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21466715159) 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, 1788892924 + ... + 1788892935.

It is an arithmetic number, because the mean of its divisors is an integer number (5366678790).

Almost surely, 2^21466715154 is an apocalyptic number.

21466715154 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21466715154 is a wasteful number, since it uses less digits than its factorization.

21466715154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577785864.

The product of its digits is 201600, while the sum is 42.

The spelling of 21466715154 in words is "twenty-one billion, four hundred sixty-six million, seven hundred fifteen thousand, one hundred fifty-four".