19763845940 has 24 divisors (see below), whose sum is σ = 41527907232. Its totient is φ = 7900999200.

The previous prime is 19763845931. The next prime is 19763845949. The reversal of 19763845940 is 4954836791.

It is an interprime number because it is at equal distance from previous prime (19763845931) and next prime (19763845949).

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19763845949) 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, 247886 + ... + 317765.

It is an arithmetic number, because the mean of its divisors is an integer number (1730329468).

Almost surely, 2^19763845940 is an apocalyptic number.

19763845940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19763845940 is an abundant number, since it is smaller than the sum of its proper divisors (21764061292).

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

19763845940 is a wasteful number, since it uses less digits than its factorization.

19763845940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567407 (or 567405 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 19763845940 in words is "nineteen billion, seven hundred sixty-three million, eight hundred forty-five thousand, nine hundred forty".