20354621358 has 8 divisors (see below), whose sum is σ = 40709242728. Its totient is φ = 6784873784.

The previous prime is 20354621333. The next prime is 20354621369. The reversal of 20354621358 is 85312645302.

It is a happy number.

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

20354621358 is an admirable number.

It is a super-2 number, since 2×20354621358² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1696218441 + ... + 1696218452.

It is an arithmetic number, because the mean of its divisors is an integer number (5088655341).

Almost surely, 2^20354621358 is an apocalyptic number.

20354621358 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20354621358 is a wasteful number, since it uses less digits than its factorization.

20354621358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3392436898.

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 20354621358 in words is "twenty billion, three hundred fifty-four million, six hundred twenty-one thousand, three hundred fifty-eight".