21496140216 has 96 divisors (see below), whose sum is σ = 60846888960. Its totient is φ = 6842907456.

The previous prime is 21496140199. The next prime is 21496140227. The reversal of 21496140216 is 61204169412.

21496140216 is a `hidden beast` number, since 2 + 1 + 496 + 140 + 21 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 1061401 + ... + 1081463.

It is an arithmetic number, because the mean of its divisors is an integer number (633821760).

Almost surely, 2^21496140216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21496140216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30423444480).

21496140216 is an abundant number, since it is smaller than the sum of its proper divisors (39350748744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21496140216 is a wasteful number, since it uses less digits than its factorization.

21496140216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20745 (or 20738 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 21496140216 in words is "twenty-one billion, four hundred ninety-six million, one hundred forty thousand, two hundred sixteen".