20707540019 has 2 divisors, whose sum is σ = 20707540020. Its totient is φ = 20707540018.

The previous prime is 20707539967. The next prime is 20707540037. The reversal of 20707540019 is 91004570702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20707540019 - 2¹² = 20707535923 is a prime.

It is a super-2 number, since 2×20707540019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20707540069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10353770009 + 10353770010.

It is an arithmetic number, because the mean of its divisors is an integer number (10353770010).

Almost surely, 2^20707540019 is an apocalyptic number.

20707540019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20707540019 is an equidigital number, since it uses as much as digits as its factorization.

20707540019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 20707540019 in words is "twenty billion, seven hundred seven million, five hundred forty thousand, nineteen".