10986921867 has 18 divisors (see below), whose sum is σ = 14870590452. Its totient is φ = 7215562944.

The previous prime is 10986921863. The next prime is 10986921877. The reversal of 10986921867 is 76812968901.

It is not a de Polignac number, because 10986921867 - 2² = 10986921863 is a prime.

It is a super-2 number, since 2×10986921867² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10986921863) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13252809 + ... + 13253637.

It is an arithmetic number, because the mean of its divisors is an integer number (826143914).

Almost surely, 2^10986921867 is an apocalyptic number.

10986921867 is a deficient number, since it is larger than the sum of its proper divisors (3883668585).

10986921867 is an frugal number, since it uses more digits than its factorization.

10986921867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 57.

The spelling of 10986921867 in words is "ten billion, nine hundred eighty-six million, nine hundred twenty-one thousand, eight hundred sixty-seven".