20372316450477 has 16 divisors (see below), whose sum is σ = 27196763793408. Its totient is φ = 13564709253680.

The previous prime is 20372316450413. The next prime is 20372316450481. The reversal of 20372316450477 is 77405461327302.

It is a cyclic number.

It is not a de Polignac number, because 20372316450477 - 2⁶ = 20372316450413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20372316451477) 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, 32337898 + ... + 32961860.

It is an arithmetic number, because the mean of its divisors is an integer number (1699797737088).

Almost surely, 2^{20372316450477} is an apocalyptic number.

It is an amenable number.

20372316450477 is a deficient number, since it is larger than the sum of its proper divisors (6824447342931).

20372316450477 is a wasteful number, since it uses less digits than its factorization.

20372316450477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637440.

The product of its (nonzero) digits is 5927040, while the sum is 51.

Adding to 20372316450477 its reverse (77405461327302), we get a palindrome (97777777777779).

The spelling of 20372316450477 in words is "twenty trillion, three hundred seventy-two billion, three hundred sixteen million, four hundred fifty thousand, four hundred seventy-seven".