16420442055 has 32 divisors (see below), whose sum is σ = 26384266944. Its totient is φ = 8720464896.

The previous prime is 16420442021. The next prime is 16420442107. The reversal of 16420442055 is 55024402461.

It is not a de Polignac number, because 16420442055 - 2¹³ = 16420433863 is a prime.

It is a super-2 number, since 2×16420442055² (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 31 ways as a sum of consecutive naturals, for example, 4029499 + ... + 4033571.

It is an arithmetic number, because the mean of its divisors is an integer number (824508342).

Almost surely, 2^16420442055 is an apocalyptic number.

16420442055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16420442055 is a deficient number, since it is larger than the sum of its proper divisors (9963824889).

16420442055 is a wasteful number, since it uses less digits than its factorization.

16420442055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155.

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 16420442055 in words is "sixteen billion, four hundred twenty million, four hundred forty-two thousand, fifty-five".