20049677839 has 2 divisors, whose sum is σ = 20049677840. Its totient is φ = 20049677838.

The previous prime is 20049677803. The next prime is 20049677863. The reversal of 20049677839 is 93877694002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20049677839 - 2¹⁷ = 20049546767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20049677839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20049677239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10024838919 + 10024838920.

It is an arithmetic number, because the mean of its divisors is an integer number (10024838920).

Almost surely, 2^20049677839 is an apocalyptic number.

20049677839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20049677839 is an equidigital number, since it uses as much as digits as its factorization.

20049677839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 20049677839 in words is "twenty billion, forty-nine million, six hundred seventy-seven thousand, eight hundred thirty-nine".