18206948223920 has 40 divisors (see below), whose sum is σ = 42483974725104. Its totient is φ = 7256487658752.

The previous prime is 18206948223917. The next prime is 18206948223929. The reversal of 18206948223920 is 2932284960281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (18206948223929) 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, 410784434 + ... + 410828753.

Almost surely, 2^{18206948223920} is an apocalyptic number.

18206948223920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18206948223920 is an abundant number, since it is smaller than the sum of its proper divisors (24277026501184).

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

18206948223920 is a wasteful number, since it uses less digits than its factorization.

18206948223920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821613477 (or 821613471 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 18206948223920 in words is "eighteen trillion, two hundred six billion, nine hundred forty-eight million, two hundred twenty-three thousand, nine hundred twenty".