20239277645 has 8 divisors (see below), whose sum is σ = 24288167904. Its totient is φ = 16190732304.

The previous prime is 20239277599. The next prime is 20239277671. The reversal of 20239277645 is 54677293202.

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 20239277645 - 2¹⁶ = 20239212109 is a prime.

It is a super-3 number, since 3×20239277645³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20239277645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67922 + ... + 212348.

It is an arithmetic number, because the mean of its divisors is an integer number (3036020988).

Almost surely, 2^20239277645 is an apocalyptic number.

It is an amenable number.

20239277645 is a deficient number, since it is larger than the sum of its proper divisors (4048890259).

20239277645 is a wasteful number, since it uses less digits than its factorization.

20239277645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172459.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 20239277645 in words is "twenty billion, two hundred thirty-nine million, two hundred seventy-seven thousand, six hundred forty-five".