20573998337 has 2 divisors, whose sum is σ = 20573998338. Its totient is φ = 20573998336.

The previous prime is 20573998331. The next prime is 20573998381. The reversal of 20573998337 is 73389937502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13271270401 + 7302727936 = 115201^2 + 85456^2 .

It is a cyclic number.

It is not a de Polignac number, because 20573998337 - 2¹⁸ = 20573736193 is a prime.

It is not a weakly prime, because it can be changed into another prime (20573998331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10286999168 + 10286999169.

It is an arithmetic number, because the mean of its divisors is an integer number (10286999169).

Almost surely, 2^20573998337 is an apocalyptic number.

It is an amenable number.

20573998337 is a deficient number, since it is larger than the sum of its proper divisors (1).

20573998337 is an equidigital number, since it uses as much as digits as its factorization.

20573998337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8573040, while the sum is 56.

The spelling of 20573998337 in words is "twenty billion, five hundred seventy-three million, nine hundred ninety-eight thousand, three hundred thirty-seven".