20231485780 has 24 divisors (see below), whose sum is σ = 46348495200. Its totient is φ = 7356903840.

The previous prime is 20231485777. The next prime is 20231485787. The reversal of 20231485780 is 8758413202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231485787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45980430 + ... + 45980869.

It is an arithmetic number, because the mean of its divisors is an integer number (1931187300).

Almost surely, 2^20231485780 is an apocalyptic number.

20231485780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20231485780 is an abundant number, since it is smaller than the sum of its proper divisors (26117009420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20231485780 is a wasteful number, since it uses less digits than its factorization.

20231485780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91961319 (or 91961317 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

Adding to 20231485780 its reverse (8758413202), we get a palindrome (28989898982).

The spelling of 20231485780 in words is "twenty billion, two hundred thirty-one million, four hundred eighty-five thousand, seven hundred eighty".