20416663445 has 16 divisors (see below), whose sum is σ = 25069470192. Its totient is φ = 15956328960.

The previous prime is 20416663411. The next prime is 20416663447. The reversal of 20416663445 is 54436661402.

It can be written as a sum of positive squares in 8 ways, for example, as 1418727556 + 18997935889 = 37666^2 + 137833^2 .

It is not a de Polignac number, because 20416663445 - 2¹⁶ = 20416597909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20416663447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103586 + ... + 227075.

It is an arithmetic number, because the mean of its divisors is an integer number (1566841887).

Almost surely, 2^20416663445 is an apocalyptic number.

It is an amenable number.

20416663445 is a deficient number, since it is larger than the sum of its proper divisors (4652806747).

20416663445 is a wasteful number, since it uses less digits than its factorization.

20416663445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330952.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 20416663445 in words is "twenty billion, four hundred sixteen million, six hundred sixty-three thousand, four hundred forty-five".