23320781406 has 24 divisors (see below), whose sum is σ = 54415157160. Its totient is φ = 7175624976.

The previous prime is 23320781399. The next prime is 23320781417. The reversal of 23320781406 is 60418702332.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49830496 + ... + 49830963.

It is an arithmetic number, because the mean of its divisors is an integer number (2267298215).

Almost surely, 2^23320781406 is an apocalyptic number.

23320781406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

23320781406 is an abundant number, since it is smaller than the sum of its proper divisors (31094375754).

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

23320781406 is a wasteful number, since it uses less digits than its factorization.

23320781406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99661480 (or 99661477 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 23320781406 in words is "twenty-three billion, three hundred twenty million, seven hundred eighty-one thousand, four hundred six".