1969325820 has 216 divisors, whose sum is σ = 7504634592. Its totient is φ = 409178880.

The previous prime is 1969325819. The next prime is 1969325857. The reversal of 1969325820 is 285239691.

1969325820 is a `hidden beast` number, since 1 + 9 + 69 + 3 + 2 + 582 + 0 = 666.

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

It is a congruent number.

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 71 ways as a sum of consecutive naturals, for example, 146002 + ... + 158918.

Almost surely, 2^1969325820 is an apocalyptic number.

1969325820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1969325820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3752317296).

1969325820 is an abundant number, since it is smaller than the sum of its proper divisors (5535308772).

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

1969325820 is a wasteful number, since it uses less digits than its factorization.

1969325820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12961 (or 12945 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1969325820 is about 44377.0866551647. The cubic root of 1969325820 is about 1253.4466626120.

The spelling of 1969325820 in words is "one billion, nine hundred sixty-nine million, three hundred twenty-five thousand, eight hundred twenty".