20538278298701 has 2 divisors, whose sum is σ = 20538278298702. Its totient is φ = 20538278298700.

The previous prime is 20538278298689. The next prime is 20538278298757. The reversal of 20538278298701 is 10789287283502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20015333822500 + 522944476201 = 4473850^2 + 723149^2 .

It is a cyclic number.

It is not a de Polignac number, because 20538278298701 - 2⁴² = 16140231787597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20538278298781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10269139149350 + 10269139149351.

It is an arithmetic number, because the mean of its divisors is an integer number (10269139149351).

Almost surely, 2^{20538278298701} is an apocalyptic number.

It is an amenable number.

20538278298701 is a deficient number, since it is larger than the sum of its proper divisors (1).

20538278298701 is an equidigital number, since it uses as much as digits as its factorization.

20538278298701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27095040, while the sum is 62.

The spelling of 20538278298701 in words is "twenty trillion, five hundred thirty-eight billion, two hundred seventy-eight million, two hundred ninety-eight thousand, seven hundred one".