20495434541 has 2 divisors, whose sum is σ = 20495434542. Its totient is φ = 20495434540.

The previous prime is 20495434537. The next prime is 20495434621. The reversal of 20495434541 is 14543459402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20446140100 + 49294441 = 142990^2 + 7021^2 .

It is a cyclic number.

It is not a de Polignac number, because 20495434541 - 2² = 20495434537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20495434241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10247717270 + 10247717271.

It is an arithmetic number, because the mean of its divisors is an integer number (10247717271).

Almost surely, 2^20495434541 is an apocalyptic number.

It is an amenable number.

20495434541 is a deficient number, since it is larger than the sum of its proper divisors (1).

20495434541 is an equidigital number, since it uses as much as digits as its factorization.

20495434541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 20495434541 in words is "twenty billion, four hundred ninety-five million, four hundred thirty-four thousand, five hundred forty-one".