21381604070 has 8 divisors (see below), whose sum is σ = 38486887344. Its totient is φ = 8552641624.

The previous prime is 21381604043. The next prime is 21381604147. The reversal of 21381604070 is 7040618312.

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

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, 1069080194 + ... + 1069080213.

It is an arithmetic number, because the mean of its divisors is an integer number (4810860918).

Almost surely, 2^21381604070 is an apocalyptic number.

21381604070 is a deficient number, since it is larger than the sum of its proper divisors (17105283274).

21381604070 is a wasteful number, since it uses less digits than its factorization.

21381604070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138160414.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 21381604070 in words is "twenty-one billion, three hundred eighty-one million, six hundred four thousand, seventy".