20217623386 has 8 divisors (see below), whose sum is σ = 30327650964. Its totient is φ = 10108406400.

The previous prime is 20217623359. The next prime is 20217623399. The reversal of 20217623386 is 68332671202.

It can be written as a sum of positive squares in 2 ways, for example, as 13788630625 + 6428992761 = 117425^2 + 80181^2 .

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

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, 135895 + ... + 242698.

Almost surely, 2^20217623386 is an apocalyptic number.

20217623386 is a deficient number, since it is larger than the sum of its proper divisors (10110027578).

20217623386 is a wasteful number, since it uses less digits than its factorization.

20217623386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405296.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 20217623386 in words is "twenty billion, two hundred seventeen million, six hundred twenty-three thousand, three hundred eighty-six".