21191519162 has 32 divisors (see below), whose sum is σ = 35406547200. Its totient is φ = 9510483840.

The previous prime is 21191519149. The next prime is 21191519203. The reversal of 21191519162 is 26191519112.

It is a happy 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, 159914 + ... + 260682.

It is an arithmetic number, because the mean of its divisors is an integer number (1106454600).

Almost surely, 2^21191519162 is an apocalyptic number.

21191519162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21191519162 is a deficient number, since it is larger than the sum of its proper divisors (14215028038).

21191519162 is a wasteful number, since it uses less digits than its factorization.

21191519162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100883 (or 100861 counting only the distinct ones).

The product of its digits is 9720, while the sum is 38.

The spelling of 21191519162 in words is "twenty-one billion, one hundred ninety-one million, five hundred nineteen thousand, one hundred sixty-two".