21494706143 has 8 divisors (see below), whose sum is σ = 23748627168. Its totient is φ = 19350732544.

The previous prime is 21494706119. The next prime is 21494706179. The reversal of 21494706143 is 34160749412.

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

It is a cyclic number.

It is not a de Polignac number, because 21494706143 - 2⁸ = 21494705887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21494706143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21494705143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27486446 + ... + 27487227.

It is an arithmetic number, because the mean of its divisors is an integer number (2968578396).

Almost surely, 2^21494706143 is an apocalyptic number.

21494706143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21494706143 is a deficient number, since it is larger than the sum of its proper divisors (2253921025).

21494706143 is a wasteful number, since it uses less digits than its factorization.

21494706143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54973713.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 21494706143 in words is "twenty-one billion, four hundred ninety-four million, seven hundred six thousand, one hundred forty-three".