20434336077 has 8 divisors (see below), whose sum is σ = 27386952064. Its totient is φ = 13552305408.

The previous prime is 20434336067. The next prime is 20434336093. The reversal of 20434336077 is 77063343402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20434336077 - 2⁷ = 20434335949 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 (20434336037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17645653 + ... + 17646810.

It is an arithmetic number, because the mean of its divisors is an integer number (3423369008).

Almost surely, 2^20434336077 is an apocalyptic number.

It is an amenable number.

20434336077 is a deficient number, since it is larger than the sum of its proper divisors (6952615987).

20434336077 is a wasteful number, since it uses less digits than its factorization.

20434336077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35292659.

The product of its (nonzero) digits is 254016, while the sum is 39.

Adding to 20434336077 its reverse (77063343402), we get a palindrome (97497679479).

The spelling of 20434336077 in words is "twenty billion, four hundred thirty-four million, three hundred thirty-six thousand, seventy-seven".