20398402373 has 2 divisors, whose sum is σ = 20398402374. Its totient is φ = 20398402372.

The previous prime is 20398402363. The next prime is 20398402417. The reversal of 20398402373 is 37320489302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12237448129 + 8160954244 = 110623^2 + 90338^2 .

It is a cyclic number.

It is not a de Polignac number, because 20398402373 - 2¹⁸ = 20398140229 is a prime.

It is a super-2 number, since 2×20398402373² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20398402373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20398402363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10199201186 + 10199201187.

It is an arithmetic number, because the mean of its divisors is an integer number (10199201187).

Almost surely, 2^20398402373 is an apocalyptic number.

It is an amenable number.

20398402373 is a deficient number, since it is larger than the sum of its proper divisors (1).

20398402373 is an equidigital number, since it uses as much as digits as its factorization.

20398402373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 20398402373 in words is "twenty billion, three hundred ninety-eight million, four hundred two thousand, three hundred seventy-three".