21619687070 has 8 divisors (see below), whose sum is σ = 38915436744. Its totient is φ = 8647874824.

The previous prime is 21619687069. The next prime is 21619687087. The reversal of 21619687070 is 7078691612.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080984344 + ... + 1080984363.

It is an arithmetic number, because the mean of its divisors is an integer number (4864429593).

Almost surely, 2^21619687070 is an apocalyptic number.

21619687070 is a deficient number, since it is larger than the sum of its proper divisors (17295749674).

21619687070 is a wasteful number, since it uses less digits than its factorization.

21619687070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161968714.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 21619687070 in words is "twenty-one billion, six hundred nineteen million, six hundred eighty-seven thousand, seventy".