16505471420 has 24 divisors (see below), whose sum is σ = 34764357264. Its totient is φ = 6582594816.

The previous prime is 16505471407. The next prime is 16505471491. The reversal of 16505471420 is 2417450561.

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, 1217702 + ... + 1231181.

It is an arithmetic number, because the mean of its divisors is an integer number (1448514886).

Almost surely, 2^16505471420 is an apocalyptic number.

16505471420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16505471420 is an abundant number, since it is smaller than the sum of its proper divisors (18258885844).

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

16505471420 is a wasteful number, since it uses less digits than its factorization.

16505471420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449229 (or 2449227 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 16505471420 in words is "sixteen billion, five hundred five million, four hundred seventy-one thousand, four hundred twenty".