20331937573 has 2 divisors, whose sum is σ = 20331937574. Its totient is φ = 20331937572.

The previous prime is 20331937547. The next prime is 20331937609. The reversal of 20331937573 is 37573913302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20214583684 + 117353889 = 142178^2 + 10833^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331937573 - 2²⁵ = 20298383141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20331937513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165968786 + 10165968787.

It is an arithmetic number, because the mean of its divisors is an integer number (10165968787).

Almost surely, 2^20331937573 is an apocalyptic number.

It is an amenable number.

20331937573 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331937573 is an equidigital number, since it uses as much as digits as its factorization.

20331937573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 357210, while the sum is 43.

The spelling of 20331937573 in words is "twenty billion, three hundred thirty-one million, nine hundred thirty-seven thousand, five hundred seventy-three".