16842220025 has 12 divisors (see below), whose sum is σ = 22112844732. Its totient is φ = 12681200640.

The previous prime is 16842220013. The next prime is 16842220033. The reversal of 16842220025 is 52002224861.

It can be written as a sum of positive squares in 6 ways, for example, as 247369984 + 16594850041 = 15728^2 + 128821^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16842220025 is a prime.

It is a super-2 number, since 2×16842220025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16842219973 and 16842220000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19813952 + ... + 19814801.

It is an arithmetic number, because the mean of its divisors is an integer number (1842737061).

Almost surely, 2^16842220025 is an apocalyptic number.

It is an amenable number.

16842220025 is a deficient number, since it is larger than the sum of its proper divisors (5270624707).

16842220025 is a wasteful number, since it uses less digits than its factorization.

16842220025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39628780 (or 39628775 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 16842220025 its reverse (52002224861), we get a palindrome (68844444886).

The spelling of 16842220025 in words is "sixteen billion, eight hundred forty-two million, two hundred twenty thousand, twenty-five".