20697372701 has 2 divisors, whose sum is σ = 20697372702. Its totient is φ = 20697372700.

The previous prime is 20697372691. The next prime is 20697372719. The reversal of 20697372701 is 10727379602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20463588601 + 233784100 = 143051^2 + 15290^2 .

It is a cyclic number.

It is not a de Polignac number, because 20697372701 - 2⁶ = 20697372637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20697378701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10348686350 + 10348686351.

It is an arithmetic number, because the mean of its divisors is an integer number (10348686351).

Almost surely, 2^20697372701 is an apocalyptic number.

It is an amenable number.

20697372701 is a deficient number, since it is larger than the sum of its proper divisors (1).

20697372701 is an equidigital number, since it uses as much as digits as its factorization.

20697372701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 44.

The spelling of 20697372701 in words is "twenty billion, six hundred ninety-seven million, three hundred seventy-two thousand, seven hundred one".