20909364573 has 8 divisors (see below), whose sum is σ = 27881366688. Its totient is φ = 13938469424.

The previous prime is 20909364571. The next prime is 20909364611. The reversal of 20909364573 is 37546390902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20909364573 - 2¹ = 20909364571 is a prime.

It is a super-3 number, since 3×20909364573³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20909364571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231615 + ... + 308972.

It is an arithmetic number, because the mean of its divisors is an integer number (3485170836).

Almost surely, 2^20909364573 is an apocalyptic number.

It is an amenable number.

20909364573 is a deficient number, since it is larger than the sum of its proper divisors (6972002115).

20909364573 is a wasteful number, since it uses less digits than its factorization.

20909364573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553483.

The product of its (nonzero) digits is 1224720, while the sum is 48.

The spelling of 20909364573 in words is "twenty billion, nine hundred nine million, three hundred sixty-four thousand, five hundred seventy-three".