19773000040 has 16 divisors (see below), whose sum is σ = 44489250180. Its totient is φ = 7909200000.

The previous prime is 19773000031. The next prime is 19773000043. The reversal of 19773000040 is 4000037791.

It can be written as a sum of positive squares in 2 ways, for example, as 16953602436 + 2819397604 = 130206^2 + 53098^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19772999966 and 19773000011.

It is not an unprimeable number, because it can be changed into a prime (19773000043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247162461 + ... + 247162540.

Almost surely, 2^19773000040 is an apocalyptic number.

19773000040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19773000040 is an abundant number, since it is smaller than the sum of its proper divisors (24716250140).

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

19773000040 is a wasteful number, since it uses less digits than its factorization.

19773000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494325012 (or 494325008 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The spelling of 19773000040 in words is "nineteen billion, seven hundred seventy-three million, forty", and thus it is an aban number.