20145690767 has 4 divisors (see below), whose sum is σ = 20152880760. Its totient is φ = 20138500776.

The previous prime is 20145690749. The next prime is 20145690809. The reversal of 20145690767 is 76709654102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20145690767 - 2⁶ = 20145690703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145690167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3590792 + ... + 3596397.

It is an arithmetic number, because the mean of its divisors is an integer number (5038220190).

Almost surely, 2^20145690767 is an apocalyptic number.

20145690767 is a deficient number, since it is larger than the sum of its proper divisors (7189993).

20145690767 is an equidigital number, since it uses as much as digits as its factorization.

20145690767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7189992.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 20145690767 in words is "twenty billion, one hundred forty-five million, six hundred ninety thousand, seven hundred sixty-seven".