20148965645 has 8 divisors (see below), whose sum is σ = 24180971256. Its totient is φ = 16117697536.

The previous prime is 20148965633. The next prime is 20148965647. The reversal of 20148965645 is 54656984102.

It can be written as a sum of positive squares in 4 ways, for example, as 117375556 + 20031590089 = 10834^2 + 141533^2 .

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 20148965645 - 2⁶ = 20148965581 is a prime.

It is a super-3 number, since 3×20148965645³ (a number of 32 digits) contains 333 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 = 20148965593 and 20148965602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20148965647) 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, 122372 + ... + 235101.

It is an arithmetic number, because the mean of its divisors is an integer number (3022621407).

Almost surely, 2^20148965645 is an apocalyptic number.

It is an amenable number.

20148965645 is a deficient number, since it is larger than the sum of its proper divisors (4032005611).

20148965645 is a wasteful number, since it uses less digits than its factorization.

20148965645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368751.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 20148965645 in words is "twenty billion, one hundred forty-eight million, nine hundred sixty-five thousand, six hundred forty-five".