20146716456 has 64 divisors (see below), whose sum is σ = 53411918400. Its totient is φ = 6310775808.

The previous prime is 20146716451. The next prime is 20146716461. The reversal of 20146716456 is 65461764102.

It is an interprime number because it is at equal distance from previous prime (20146716451) and next prime (20146716461).

It is a super-2 number, since 2×20146716456² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20146716451) 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, 228615 + ... + 304233.

It is an arithmetic number, because the mean of its divisors is an integer number (834561225).

Almost surely, 2^20146716456 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 20146716456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26705959200).

20146716456 is an abundant number, since it is smaller than the sum of its proper divisors (33265201944).

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

20146716456 is a wasteful number, since it uses less digits than its factorization.

20146716456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76298 (or 76294 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 20146716456 in words is "twenty billion, one hundred forty-six million, seven hundred sixteen thousand, four hundred fifty-six".