20332420523 has 32 divisors (see below), whose sum is σ = 22141317120. Its totient is φ = 18631140480.

The previous prime is 20332420519. The next prime is 20332420561. The reversal of 20332420523 is 32502423302.

It is a cyclic number.

It is not a de Polignac number, because 20332420523 - 2² = 20332420519 is a prime.

It is a super-2 number, since 2×20332420523² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20332420492 and 20332420501.

It is not an unprimeable number, because it can be changed into a prime (20332420513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6968861 + ... + 6971777.

It is an arithmetic number, because the mean of its divisors is an integer number (691916160).

Almost surely, 2^20332420523 is an apocalyptic number.

20332420523 is a deficient number, since it is larger than the sum of its proper divisors (1808896597).

20332420523 is a wasteful number, since it uses less digits than its factorization.

20332420523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3147.

The product of its (nonzero) digits is 8640, while the sum is 26.

Adding to 20332420523 its reverse (32502423302), we get a palindrome (52834843825).

The spelling of 20332420523 in words is "twenty billion, three hundred thirty-two million, four hundred twenty thousand, five hundred twenty-three".