18963207940 has 24 divisors (see below), whose sum is σ = 42165251352. Its totient is φ = 7139089920.

The previous prime is 18963207931. The next prime is 18963207943. The reversal of 18963207940 is 4970236981.

It can be written as a sum of positive squares in 4 ways, for example, as 2352638016 + 16610569924 = 48504^2 + 128882^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18963207943) 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, 27886731 + ... + 27887410.

It is an arithmetic number, because the mean of its divisors is an integer number (1756885473).

Almost surely, 2^18963207940 is an apocalyptic number.

18963207940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18963207940 is an abundant number, since it is smaller than the sum of its proper divisors (23202043412).

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

18963207940 is a wasteful number, since it uses less digits than its factorization.

18963207940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55774167 (or 55774165 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 18963207940 in words is "eighteen billion, nine hundred sixty-three million, two hundred seven thousand, nine hundred forty".