20954082077 has 2 divisors, whose sum is σ = 20954082078. Its totient is φ = 20954082076.

The previous prime is 20954082049. The next prime is 20954082131. The reversal of 20954082077 is 77028045902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19326282361 + 1627799716 = 139019^2 + 40346^2 .

It is a cyclic number.

It is not a de Polignac number, because 20954082077 - 2⁶ = 20954082013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20954082577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10477041038 + 10477041039.

It is an arithmetic number, because the mean of its divisors is an integer number (10477041039).

Almost surely, 2^20954082077 is an apocalyptic number.

It is an amenable number.

20954082077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20954082077 is an equidigital number, since it uses as much as digits as its factorization.

20954082077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 20954082077 in words is "twenty billion, nine hundred fifty-four million, eighty-two thousand, seventy-seven".