21712389291926 has 16 divisors (see below), whose sum is σ = 34283067563760. Its totient is φ = 10284711691680.

The previous prime is 21712389291911. The next prime is 21712389291941. The reversal of 21712389291926 is 62919298321712.

It is an interprime number because it is at equal distance from previous prime (21712389291911) and next prime (21712389291941).

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966836 + ... + 6660296.

It is an arithmetic number, because the mean of its divisors is an integer number (2142691722735).

Almost surely, 2^{21712389291926} is an apocalyptic number.

21712389291926 is a deficient number, since it is larger than the sum of its proper divisors (12570678271834).

21712389291926 is a wasteful number, since it uses less digits than its factorization.

21712389291926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5793839.

The product of its digits is 11757312, while the sum is 62.

The spelling of 21712389291926 in words is "twenty-one trillion, seven hundred twelve billion, three hundred eighty-nine million, two hundred ninety-one thousand, nine hundred twenty-six".