21450087794901 has 16 divisors (see below), whose sum is σ = 29027377059264. Its totient is φ = 14086434303744.

The previous prime is 21450087794893. The next prime is 21450087794923. The reversal of 21450087794901 is 10949778005412.

It is not a de Polignac number, because 21450087794901 - 2³ = 21450087794893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450087796901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15030205 + ... + 16395341.

It is an arithmetic number, because the mean of its divisors is an integer number (1814211066204).

Almost surely, 2^{21450087794901} is an apocalyptic number.

It is an amenable number.

21450087794901 is a deficient number, since it is larger than the sum of its proper divisors (7577289264363).

21450087794901 is a wasteful number, since it uses less digits than its factorization.

21450087794901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443380.

The product of its (nonzero) digits is 5080320, while the sum is 57.

The spelling of 21450087794901 in words is "twenty-one trillion, four hundred fifty billion, eighty-seven million, seven hundred ninety-four thousand, nine hundred one".