19661100830 has 32 divisors (see below), whose sum is σ = 40494021120. Its totient is φ = 6732894240.

The previous prime is 19661100827. The next prime is 19661100887. The reversal of 19661100830 is 3800116691.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108656 + ... + 226115.

It is an arithmetic number, because the mean of its divisors is an integer number (1265438160).

Almost surely, 2^19661100830 is an apocalyptic number.

19661100830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19661100830 is an abundant number, since it is smaller than the sum of its proper divisors (20832920290).

19661100830 is a wasteful number, since it uses less digits than its factorization.

19661100830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335624.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 19661100830 in words is "nineteen billion, six hundred sixty-one million, one hundred thousand, eight hundred thirty".