16420647400 has 96 divisors (see below), whose sum is σ = 40227336000. Its totient is φ = 6216376320.

The previous prime is 16420647371. The next prime is 16420647421. The reversal of 16420647400 is 474602461.

It is a super-2 number, since 2×16420647400² (a number of 21 digits) contains 22 as substring.

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, 6105256 + ... + 6107944.

It is an arithmetic number, because the mean of its divisors is an integer number (419034750).

Almost surely, 2^16420647400 is an apocalyptic number.

16420647400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16420647400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20113668000).

16420647400 is an abundant number, since it is smaller than the sum of its proper divisors (23806688600).

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

16420647400 is a wasteful number, since it uses less digits than its factorization.

16420647400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331 (or 4322 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The spelling of 16420647400 in words is "sixteen billion, four hundred twenty million, six hundred forty-seven thousand, four hundred".