16740620993 has 2 divisors, whose sum is σ = 16740620994. Its totient is φ = 16740620992.

The previous prime is 16740620977. The next prime is 16740620999. The reversal of 16740620993 is 39902604761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11192158849 + 5548462144 = 105793^2 + 74488^2 .

It is a cyclic number.

It is not a de Polignac number, because 16740620993 - 2⁴ = 16740620977 is a prime.

It is not a weakly prime, because it can be changed into another prime (16740620999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8370310496 + 8370310497.

It is an arithmetic number, because the mean of its divisors is an integer number (8370310497).

Almost surely, 2^16740620993 is an apocalyptic number.

It is an amenable number.

16740620993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16740620993 is an equidigital number, since it uses as much as digits as its factorization.

16740620993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 16740620993 in words is "sixteen billion, seven hundred forty million, six hundred twenty thousand, nine hundred ninety-three".