21339130894 has 8 divisors (see below), whose sum is σ = 32753084760. Its totient is φ = 10421435976.

The previous prime is 21339130889. The next prime is 21339130913. The reversal of 21339130894 is 49803193312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21339130894² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 21339130894.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124064629 + ... + 124064800.

It is an arithmetic number, because the mean of its divisors is an integer number (4094135595).

Almost surely, 2^21339130894 is an apocalyptic number.

21339130894 is a deficient number, since it is larger than the sum of its proper divisors (11413953866).

21339130894 is a wasteful number, since it uses less digits than its factorization.

21339130894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248129474.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 21339130894 in words is "twenty-one billion, three hundred thirty-nine million, one hundred thirty thousand, eight hundred ninety-four".