20738437593823 has 2 divisors, whose sum is σ = 20738437593824. Its totient is φ = 20738437593822.

The previous prime is 20738437593803. The next prime is 20738437593917. The reversal of 20738437593823 is 32839573483702.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20738437593823 - 2¹⁷ = 20738437462751 is a prime.

It is a super-2 number, since 2×20738437593823² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20738437593803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10369218796911 + 10369218796912.

It is an arithmetic number, because the mean of its divisors is an integer number (10369218796912).

Almost surely, 2^{20738437593823} is an apocalyptic number.

20738437593823 is a deficient number, since it is larger than the sum of its proper divisors (1).

20738437593823 is an equidigital number, since it uses as much as digits as its factorization.

20738437593823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 182891520, while the sum is 64.

The spelling of 20738437593823 in words is "twenty trillion, seven hundred thirty-eight billion, four hundred thirty-seven million, five hundred ninety-three thousand, eight hundred twenty-three".