16686821480 has 32 divisors (see below), whose sum is σ = 42908970240. Its totient is φ = 5721195840.

The previous prime is 16686821449. The next prime is 16686821483. The reversal of 16686821480 is 8412868661.

It is a super-2 number, since 2×16686821480² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16686821483) 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, 29797616 + ... + 29798175.

It is an arithmetic number, because the mean of its divisors is an integer number (1340905320).

Almost surely, 2^16686821480 is an apocalyptic number.

16686821480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16686821480 is an abundant number, since it is smaller than the sum of its proper divisors (26222148760).

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

16686821480 is a wasteful number, since it uses less digits than its factorization.

16686821480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59595809 (or 59595805 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The spelling of 16686821480 in words is "sixteen billion, six hundred eighty-six million, eight hundred twenty-one thousand, four hundred eighty".