21364126766703 has 24 divisors (see below), whose sum is σ = 35268030064800. Its totient is φ = 12207980623104.

The previous prime is 21364126766681. The next prime is 21364126766729. The reversal of 21364126766703 is 30766762146312.

21364126766703 is a `hidden beast` number, since 21 + 364 + 126 + 76 + 6 + 70 + 3 = 666.

It is not a de Polignac number, because 21364126766703 - 2³⁰ = 21363053024879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21364126766703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364126766783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7661083 + ... + 10070771.

It is an arithmetic number, because the mean of its divisors is an integer number (1469501252700).

Almost surely, 2^{21364126766703} is an apocalyptic number.

21364126766703 is a deficient number, since it is larger than the sum of its proper divisors (13903903298097).

21364126766703 is a wasteful number, since it uses less digits than its factorization.

21364126766703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550431 (or 2550428 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 54.

The spelling of 21364126766703 in words is "twenty-one trillion, three hundred sixty-four billion, one hundred twenty-six million, seven hundred sixty-six thousand, seven hundred three".