20615506607 has 2 divisors, whose sum is σ = 20615506608. Its totient is φ = 20615506606.

The previous prime is 20615506591. The next prime is 20615506609. The reversal of 20615506607 is 70660551602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20615506607 - 2⁴ = 20615506591 is a prime.

It is a super-2 number, since 2×20615506607² (a number of 21 digits) contains 22 as substring.

Together with 20615506609, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20615506609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10307753303 + 10307753304.

It is an arithmetic number, because the mean of its divisors is an integer number (10307753304).

Almost surely, 2^20615506607 is an apocalyptic number.

20615506607 is a deficient number, since it is larger than the sum of its proper divisors (1).

20615506607 is an equidigital number, since it uses as much as digits as its factorization.

20615506607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 20615506607 in words is "twenty billion, six hundred fifteen million, five hundred six thousand, six hundred seven".