21154511160550 has 48 divisors (see below), whose sum is σ = 39854885945472. Its totient is φ = 8353162944000.

The previous prime is 21154511160539. The next prime is 21154511160589. The reversal of 21154511160550 is 5506111545112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4513302 + ... + 7917001.

It is an arithmetic number, because the mean of its divisors is an integer number (830310123864).

Almost surely, 2^{21154511160550} is an apocalyptic number.

21154511160550 is a deficient number, since it is larger than the sum of its proper divisors (18700374784922).

21154511160550 is a wasteful number, since it uses less digits than its factorization.

21154511160550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12430753 (or 12430748 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 37.

The spelling of 21154511160550 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred eleven million, one hundred sixty thousand, five hundred fifty".