19387961010 has 128 divisors (see below), whose sum is σ = 56960651520. Its totient is φ = 4653504000.

The previous prime is 19387960997. The next prime is 19387961041. The reversal of 19387961010 is 1016978391.

19387961010 is a `hidden beast` number, since 19 + 3 + 8 + 7 + 9 + 610 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 267654 + ... + 332286.

It is an arithmetic number, because the mean of its divisors is an integer number (445005090).

Almost surely, 2^19387961010 is an apocalyptic number.

19387961010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19387961010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28480325760).

19387961010 is an abundant number, since it is smaller than the sum of its proper divisors (37572690510).

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

19387961010 is a wasteful number, since it uses less digits than its factorization.

19387961010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64761 (or 64755 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The spelling of 19387961010 in words is "nineteen billion, three hundred eighty-seven million, nine hundred sixty-one thousand, ten".