20300401665 has 24 divisors (see below), whose sum is σ = 35203020840. Its totient is φ = 10822063104.

The previous prime is 20300401637. The next prime is 20300401669. The reversal of 20300401665 is 56610400302.

It can be written as a sum of positive squares in 4 ways, for example, as 5844908304 + 14455493361 = 76452^2 + 120231^2 .

It is not a de Polignac number, because 20300401665 - 2⁸ = 20300401409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20300401669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3051 + ... + 201519.

It is an arithmetic number, because the mean of its divisors is an integer number (1466792535).

Almost surely, 2^20300401665 is an apocalyptic number.

It is an amenable number.

20300401665 is a deficient number, since it is larger than the sum of its proper divisors (14902619175).

20300401665 is a wasteful number, since it uses less digits than its factorization.

20300401665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200753 (or 200750 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 20300401665 its reverse (56610400302), we get a palindrome (76910801967).

The spelling of 20300401665 in words is "twenty billion, three hundred million, four hundred one thousand, six hundred sixty-five".