10780021819 has 12 divisors (see below), whose sum is σ = 12341694064. Its totient is φ = 9223787664.

The previous prime is 10780021807. The next prime is 10780021829. The reversal of 10780021819 is 91812008701.

It is not a de Polignac number, because 10780021819 - 2⁵ = 10780021787 is a prime.

It is a super-2 number, since 2×10780021819² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (10780021829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9081144 + ... + 9082330.

Almost surely, 2^10780021819 is an apocalyptic number.

10780021819 is a deficient number, since it is larger than the sum of its proper divisors (1561672245).

10780021819 is an frugal number, since it uses more digits than its factorization.

10780021819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474 (or 2287 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 37.

The spelling of 10780021819 in words is "ten billion, seven hundred eighty million, twenty-one thousand, eight hundred nineteen".