19775109376 has 243 divisors, whose sum is σ = 47091494737. Its totient is φ = 8279941120.

The previous prime is 19775109373. The next prime is 19775109377. The reversal of 19775109376 is 67390157791.

The square root of 19775109376 is 140624.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 15395846400 + 4379262976 = 124080^2 + 66176^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19775109373) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 420746985 + ... + 420747031.

Almost surely, 2^19775109376 is an apocalyptic number.

19775109376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19775109376 is the 140624-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19775109376

19775109376 is an abundant number, since it is smaller than the sum of its proper divisors (27316385361).

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

19775109376 is an equidigital number, since it uses as much as digits as its factorization.

19775109376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 2500470, while the sum is 55.

The spelling of 19775109376 in words is "nineteen billion, seven hundred seventy-five million, one hundred nine thousand, three hundred seventy-six".