20612516767 has 2 divisors, whose sum is σ = 20612516768. Its totient is φ = 20612516766.

The previous prime is 20612516761. The next prime is 20612516791. The reversal of 20612516767 is 76761521602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20612516767 - 2²³ = 20604128159 is a prime.

It is a super-2 number, since 2×20612516767² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20612516761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10306258383 + 10306258384.

It is an arithmetic number, because the mean of its divisors is an integer number (10306258384).

Almost surely, 2^20612516767 is an apocalyptic number.

20612516767 is a deficient number, since it is larger than the sum of its proper divisors (1).

20612516767 is an equidigital number, since it uses as much as digits as its factorization.

20612516767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 20612516767 in words is "twenty billion, six hundred twelve million, five hundred sixteen thousand, seven hundred sixty-seven".