16420664352 has 24 divisors (see below), whose sum is σ = 43104244176. Its totient is φ = 5473554752.

The previous prime is 16420664333. The next prime is 16420664363. The reversal of 16420664352 is 25346602461.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×16420664352² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16420664352.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85524198 + ... + 85524389.

It is an arithmetic number, because the mean of its divisors is an integer number (1796010174).

Almost surely, 2^16420664352 is an apocalyptic number.

16420664352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16420664352 is an abundant number, since it is smaller than the sum of its proper divisors (26683579824).

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

16420664352 is a wasteful number, since it uses less digits than its factorization.

16420664352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171048600 (or 171048592 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 16420664352 in words is "sixteen billion, four hundred twenty million, six hundred sixty-four thousand, three hundred fifty-two".