21119892786 has 24 divisors (see below), whose sum is σ = 45771620544. Its totient is φ = 7038140760.

The previous prime is 21119892769. The next prime is 21119892791. The reversal of 21119892786 is 68729891112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79606 + ... + 220401.

It is an arithmetic number, because the mean of its divisors is an integer number (1907150856).

Almost surely, 2^21119892786 is an apocalyptic number.

21119892786 is an abundant number, since it is smaller than the sum of its proper divisors (24651727758).

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

21119892786 is a wasteful number, since it uses less digits than its factorization.

21119892786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303926 (or 303923 counting only the distinct ones).

The product of its digits is 870912, while the sum is 54.

The spelling of 21119892786 in words is "twenty-one billion, one hundred nineteen million, eight hundred ninety-two thousand, seven hundred eighty-six".