16505282420 has 24 divisors (see below), whose sum is σ = 37812102048. Its totient is φ = 6001920800.

The previous prime is 16505282399. The next prime is 16505282449. The reversal of 16505282420 is 2428250561.

It is a super-2 number, since 2×16505282420² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37511786 + ... + 37512225.

It is an arithmetic number, because the mean of its divisors is an integer number (1575504252).

Almost surely, 2^16505282420 is an apocalyptic number.

16505282420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16505282420 is an abundant number, since it is smaller than the sum of its proper divisors (21306819628).

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

16505282420 is a wasteful number, since it uses less digits than its factorization.

16505282420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75024031 (or 75024029 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The spelling of 16505282420 in words is "sixteen billion, five hundred five million, two hundred eighty-two thousand, four hundred twenty".