20383638313 has 2 divisors, whose sum is σ = 20383638314. Its totient is φ = 20383638312.

The previous prime is 20383638281. The next prime is 20383638337. The reversal of 20383638313 is 31383638302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19180034064 + 1203604249 = 138492^2 + 34693^2 .

It is a cyclic number.

It is not a de Polignac number, because 20383638313 - 2⁵ = 20383638281 is a prime.

It is not a weakly prime, because it can be changed into another prime (20383938313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10191819156 + 10191819157.

It is an arithmetic number, because the mean of its divisors is an integer number (10191819157).

Almost surely, 2^20383638313 is an apocalyptic number.

It is an amenable number.

20383638313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20383638313 is an equidigital number, since it uses as much as digits as its factorization.

20383638313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 20383638313 in words is "twenty billion, three hundred eighty-three million, six hundred thirty-eight thousand, three hundred thirteen".