21011577154 has 8 divisors (see below), whose sum is σ = 31517982720. Its totient is φ = 10505582916.

The previous prime is 21011577133. The next prime is 21011577163. The reversal of 21011577154 is 45177511012.

21011577154 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133567 + ... + 244669.

It is an arithmetic number, because the mean of its divisors is an integer number (3939747840).

Almost surely, 2^21011577154 is an apocalyptic number.

21011577154 is a deficient number, since it is larger than the sum of its proper divisors (10506405566).

21011577154 is a wasteful number, since it uses less digits than its factorization.

21011577154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205664.

The product of its (nonzero) digits is 9800, while the sum is 34.

The spelling of 21011577154 in words is "twenty-one billion, eleven million, five hundred seventy-seven thousand, one hundred fifty-four".