19766181072 has 40 divisors (see below), whose sum is σ = 55704693600. Its totient is φ = 5989751680.

The previous prime is 19766181059. The next prime is 19766181091. The reversal of 19766181072 is 27018166791.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18717447 + ... + 18718502.

It is an arithmetic number, because the mean of its divisors is an integer number (1392617340).

Almost surely, 2^19766181072 is an apocalyptic number.

19766181072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19766181072 is an abundant number, since it is smaller than the sum of its proper divisors (35938512528).

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

19766181072 is a wasteful number, since it uses less digits than its factorization.

19766181072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37435971 (or 37435965 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 48.

The spelling of 19766181072 in words is "nineteen billion, seven hundred sixty-six million, one hundred eighty-one thousand, seventy-two".