20387339741 has 2 divisors, whose sum is σ = 20387339742. Its totient is φ = 20387339740.

The previous prime is 20387339669. The next prime is 20387339767. The reversal of 20387339741 is 14793378302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13218330841 + 7169008900 = 114971^2 + 84670^2 .

It is a cyclic number.

It is not a de Polignac number, because 20387339741 - 2²² = 20383145437 is a prime.

It is a super-4 number, since 4×20387339741⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20387309741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10193669870 + 10193669871.

It is an arithmetic number, because the mean of its divisors is an integer number (10193669871).

Almost surely, 2^20387339741 is an apocalyptic number.

It is an amenable number.

20387339741 is a deficient number, since it is larger than the sum of its proper divisors (1).

20387339741 is an equidigital number, since it uses as much as digits as its factorization.

20387339741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 20387339741 in words is "twenty billion, three hundred eighty-seven million, three hundred thirty-nine thousand, seven hundred forty-one".