20694296838541 has 2 divisors, whose sum is σ = 20694296838542. Its totient is φ = 20694296838540.

The previous prime is 20694296838517. The next prime is 20694296838571. The reversal of 20694296838541 is 14583869249602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19460264681641 + 1234032156900 = 4411379^2 + 1110870^2 .

It is a cyclic number.

It is not a de Polignac number, because 20694296838541 - 2¹³ = 20694296830349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20694296838571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10347148419270 + 10347148419271.

It is an arithmetic number, because the mean of its divisors is an integer number (10347148419271).

Almost surely, 2^{20694296838541} is an apocalyptic number.

It is an amenable number.

20694296838541 is a deficient number, since it is larger than the sum of its proper divisors (1).

20694296838541 is an equidigital number, since it uses as much as digits as its factorization.

20694296838541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 179159040, while the sum is 67.

The spelling of 20694296838541 in words is "twenty trillion, six hundred ninety-four billion, two hundred ninety-six million, eight hundred thirty-eight thousand, five hundred forty-one".