20434662312477 has 16 divisors (see below), whose sum is σ = 31169031153792. Its totient is φ = 11665513103040.

The previous prime is 20434662312473. The next prime is 20434662312517. The reversal of 20434662312477 is 77421326643402.

It is not a de Polignac number, because 20434662312477 - 2² = 20434662312473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434662312473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 476510958 + ... + 476553839.

It is an arithmetic number, because the mean of its divisors is an integer number (1948064447112).

Almost surely, 2^{20434662312477} is an apocalyptic number.

It is an amenable number.

20434662312477 is a deficient number, since it is larger than the sum of its proper divisors (10734368841315).

20434662312477 is a wasteful number, since it uses less digits than its factorization.

20434662312477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953065828.

The product of its (nonzero) digits is 8128512, while the sum is 51.

Adding to 20434662312477 its reverse (77421326643402), we get a palindrome (97855988955879).

The spelling of 20434662312477 in words is "twenty trillion, four hundred thirty-four billion, six hundred sixty-two million, three hundred twelve thousand, four hundred seventy-seven".