20778025027 has 2 divisors, whose sum is σ = 20778025028. Its totient is φ = 20778025026.

The previous prime is 20778024931. The next prime is 20778025057. The reversal of 20778025027 is 72052087702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20778025027 - 2¹⁹ = 20777500739 is a prime.

It is not a weakly prime, because it can be changed into another prime (20778025057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10389012513 + 10389012514.

It is an arithmetic number, because the mean of its divisors is an integer number (10389012514).

Almost surely, 2^20778025027 is an apocalyptic number.

20778025027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20778025027 is an equidigital number, since it uses as much as digits as its factorization.

20778025027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109760, while the sum is 40.

The spelling of 20778025027 in words is "twenty billion, seven hundred seventy-eight million, twenty-five thousand, twenty-seven".