21194599340 has 12 divisors (see below), whose sum is σ = 44508658656. Its totient is φ = 8477839728.

The previous prime is 21194599297. The next prime is 21194599367. The reversal of 21194599340 is 4399549112.

It is a super-2 number, since 2×21194599340² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529864964 + ... + 529865003.

It is an arithmetic number, because the mean of its divisors is an integer number (3709054888).

Almost surely, 2^21194599340 is an apocalyptic number.

21194599340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21194599340 is an abundant number, since it is smaller than the sum of its proper divisors (23314059316).

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

21194599340 is a wasteful number, since it uses less digits than its factorization.

21194599340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059729976 (or 1059729974 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 21194599340 in words is "twenty-one billion, one hundred ninety-four million, five hundred ninety-nine thousand, three hundred forty".