20667735445 has 16 divisors (see below), whose sum is σ = 28349608320. Its totient is φ = 14169518784.

The previous prime is 20667735443. The next prime is 20667735479. The reversal of 20667735445 is 54453776602.

It is a cyclic number.

It is not a de Polignac number, because 20667735445 - 2¹ = 20667735443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20667735443) 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, 145626 + ... + 250084.

It is an arithmetic number, because the mean of its divisors is an integer number (1771850520).

Almost surely, 2^20667735445 is an apocalyptic number.

It is an amenable number.

20667735445 is a deficient number, since it is larger than the sum of its proper divisors (7681872875).

20667735445 is a wasteful number, since it uses less digits than its factorization.

20667735445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110124.

The product of its (nonzero) digits is 4233600, while the sum is 49.

The spelling of 20667735445 in words is "twenty billion, six hundred sixty-seven million, seven hundred thirty-five thousand, four hundred forty-five".