21403152107705 has 16 divisors (see below), whose sum is σ = 26283244103424. Its totient is φ = 16722946222080.

The previous prime is 21403152107683. The next prime is 21403152107719. The reversal of 21403152107705 is 50770125130412.

It is a de Polignac number, because none of the positive numbers 2^k-21403152107705 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1478369 + ... + 6707598.

It is an arithmetic number, because the mean of its divisors is an integer number (1642702756464).

Almost surely, 2^{21403152107705} is an apocalyptic number.

It is an amenable number.

21403152107705 is a deficient number, since it is larger than the sum of its proper divisors (4880091995719).

21403152107705 is a wasteful number, since it uses less digits than its factorization.

21403152107705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8198176.

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 21403152107705 in words is "twenty-one trillion, four hundred three billion, one hundred fifty-two million, one hundred seven thousand, seven hundred five".